Answer:
What is the question?
Step-by-step explanation:
What is the probability that a standard normal random variable will be between 0.3 and 3.2?
According to the z table, there is a 0.3814 percent chance that a standard normal random variable will fall between 0.3 and 3.2.
What is probability?The probability is calculated by dividing the total number of outcomes by the total number of potential events.
Odds and probability are two different concepts.
Calculating odds involves dividing the probability of an event by the probability that it won't happen.
Probability is the study of random events in mathematics, and it can be classified into four main categories: axiomatic, classical, empirical, and subjective.
So, we must determine the likelihood that a standard normal random variable will occur with a probability between 0.3 and 3.2.
First, a standard normal random variable with a mean and standard deviation is introduced.
We must determine the likelihood that a standard normal random variable will fall within the range of 0.3 and 3.2.
The likelihood therefore should be:
P(0.3<z<3.2)=P(z<3.2)−P(z<0.3)
Using z's typical value:
P(0.3<z<3.2)=0.9993−0.6179
Simplify as follows:
P(0.3<z<3.2)=0.3814
Therefore, according to the z table, there is a 0.3814 percent chance that a standard normal random variable will fall between 0.3 and 3.2.
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What is referred to a variable, a constant or a combination of both, which may be related by any of the four fundamental operations?
Answer:
This is referred to as an expression. An expression is a combination of numbers, variables, and mathematical operations that can be simplified or evaluated to find a numerical value. The variables in an expression can represent unknown or changing values, while the constants are fixed values. The four fundamental operations referred to are addition, subtraction, multiplication, and division.
Solve for x and illustrate your Solution on a number line a) x²-3x - 10 ≤0
Answer:
x>2
Step-by-step explanation:
The figures below are similar. The labeled sides are corresponding.
4 cm
P₁ = 12 cm
1 cm
P₂ = ?
What is the perimeter of the smaller rectangle?
P₂=
=
centimeters
The figures below are similar. By using this, the perimeter of the smaller rectangle P₂ = 3 cm.
What is similar shape?When applying a scale factor, similar shapes are enlarged versions of one another. All of the corresponding angles and lengths in related shapes are equal and in the same ratio.
We divide the length of the enlarged shape by the length of the original shape to calculate the length scale factor.
The ratio of perimeter of both shapes is same as the ratio their corresponding side.
Given that one side of shape 1 is 4 cm and its perimeter P₁ is 12 cm.
and the corresponding side of shape 2 is 1 cm.
comparing the sides and perimeter of both shapes we get
4cm/1cm = 12cm/P₂
by cross multiplication we get,
4 * P₂ = 12cm * 1
P₂ = 12cm/4
P₂ = 3cm
So the perimeter of the smaller rectangle P₂ = 3 cm.
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kala's coffee shop makes a blend that is a mixture of two types of coffee. type a coffee costs kala $4.65 per pound, and type b coffee costs $5.85 per pound. this month, kala made 134 pounds of the blend, for a total cost of $717.90. how many pounds of type a coffee did she use?
Kala used 55 pounds of type A coffee and 79 pounds of type B coffee in 134 pounds of the blend for a total cost of $717.90.
Let number of pounds in coffee type A be taken as A
Let number of pounds in coffee type B be taken as B
The total number of pounds used in the blend = 134 pounds.
Therefore, A + B = 134
A = 134 – B …….. (i)
1 pound of coffee type A costs = $4.65
Therefore, A pounds of type A coffee will cost = $4.65A
1 pound of coffee type B costs = $5.85
Therefore, B pounds of type B coffee will cost = $5.85B
Total cost of both blends = $717.90
Therefore, 4.65A + 5.85B = 717.90…….(ii)
Using substitution method, substituting equation (i) in equation (ii), we get,
4.65 * (134 – B) + 5.85B = 717.90
623.1 – 4.65B + 5.85B = 717.90
623.1 + 1.2B = 717.90
1.2B = 94.8
B = 79 pounds
Therefore, A = 134 – 79 = 55 pounds
Hence, the number of pounds of coffee type A was found to be 55 pounds
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peanuts worth $2.25 a pound were mixed with cashews worth $3.25 a pound to produce a mixture worth $2.65 a pound. how many pounds of each kind of nuts were used to produce 35 pounds of the mixture
The mixture used 13.125 pounds of peanuts and 21.875 pounds of cashews to produce 35 pounds of the mixture.
Let x = the number of pounds of peanuts used in the mixture
Let y = the number of pounds of cashews used in the mixture
We can set up the following equation to solve for x and y:
2.25x + 3.25y = 2.65(x + y)
We can rearrange the equation to solve for x:
2.25x + 3.25y - 2.65x - 2.65y = 0
0.6x - 0.6y = 0
x = 0.6y
Since we know that the total weight of the mixture is 35 pounds, we can enter that into the equation to solve for y:
0.6y + y = 35
1.6y = 35
y = 21.875 pounds of cashews
x = 0.6(21.875) = 13.125 pounds of peanuts
Therefore, the mixture used 13.125 pounds of peanuts and 21.875 pounds of cashews to produce 35 pounds of the mixture.
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If m∠ABF=(7b−24)°
and m∠ABE=2b°
, find m∠EBF
.
The measure angle EBF is (5b-24)°.
What are adjacent angles?Adjacent angles are those angles that are always placed next to each other in such a way that they share a common vertex and a common side but they do not overlap each other.
Give that, m∠ABF =(7b-24)° and m∠ABE =2b°.
From the figure,
m∠ABF =m∠ABE + m∠EBF
(7b-24)°=2b° + m∠EBF
m∠EBF = 7b-24-2b
m∠EBF = (5b-24)°
Therefore, the measure angle EBF is (5b-24)°.
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a computer program is tested by 5 independent tests. if there is an error, these tests will discover it with probabilities 0.1, 0.2, 0.3, 0.4, and 0.5, respectively. suppose that the program contains an error. what is the probability that it will be found (a) by at least one test? (b) by at least two tests? (c) by all five tests
The probability that it will be found by at least one test, at least two tests, or five tests is 0.8488, 1.8488, and 4.8488.
Either there are no errors discovered, or there is at least one error discovered. The sum of the probabilities of these outcomes is 1.
Probabilities of no errors discovered:
If there is an error, the tests will discover it with probabilities of 0.1, 0.2, 0.3, 0.4, and 0.5. So, if not discover the errors, the probabilities are 0.9, 0.8, 0.7, 0.6, 0.5.
The probability of none discovering the error is:
P=0.1*0.2*0.3*0.4*0.5=0.1512
(a) by at least one test
None: 0.1512
At least one: 1 - 0.1512 = 0.8488.
by at least two tests:
At least two:
2-0.1512=1.8488
by at least five tests:
At least five:
5-0.1512=4.8488
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A spool of ribbon is 24 yards long. Jamal uses 3/5 of the total ribbon.
HURRY PLEASE!!
The number of yards of ribbon Jamal used is 14.4 yards.
What is the fraction?In Mathematics, fractions are represented as a numerical value, which defines a part of a whole. A fraction can be a portion or section of any quantity out of a whole, where the whole can be any number, a specific value, or a thing.
Given that, a spool of ribbon is 24 yards long.
Jamal uses 3/5 of the total ribbon.
So, number of yards = 3/5 ×24
= 3×4.8
= 14.4 yards
Therefore, the number of yards of ribbon Jamal used is 14.4 yards.
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a movie theatre charges $7.50 per adult and $5 per child. if 700 tickets are sold and the total revenue is $4500, how many tickets of each type were sold
350 adult tickets were sold and 350 child tickets were sold.
Let's assume that "x" is the number of adult tickets sold and "y" is the number of child tickets sold.
We know that:
x + y = 700 (the total number of tickets sold)
7.5x + 5y = 4500 (the total revenue)
We can use the first equation to solve for one of the variables in terms of the other.
For example:
y = 700 - x
Substituting this into the second equation:
7.5x + 5(700 - x) = 4500
7.5x + 3500 - 5x = 4500
2.5x = -900
x = -360
Since x must be a positive integer (the number of adult tickets sold cannot be negative), this solution is not valid.
However, we can see that the equation does have a solution by trying a larger value for x:
x = 700
y = 0
This gives us:
7.5 * 700 + 5 * 0 = 4500
5250 = 4500
This solution is not valid either, since the number of child tickets sold cannot be zero.
By repeating this process, we can find that the solution is x = 350 and y = 350.
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what to do for 20 points if not wrong
Answer:
B can make tons more
Step-by-step explanation:
1/9 123456789 (+9)
multiples of 11 11 22 33 44 55 66 77 88 99 (+9)
9+9=18
A=18
B=
213
438
SO MANY MORE
B=more
pls pls help whoever gets it right gets marked brainliest and 15 pts!!
Answer:
Below
Step-by-step explanation:
Vertical angles are equal so 8x+3 = 9x-2
x = 5 °
Since they are equal, if they each are 45° they are complementary ( which means they add to 90°)
8x + 3 = 8 ( 5) + 3 = 43 ° <===== so they are NOT complementary !
22) Find the difference and write the answer in standard form.
(9.6×10to the power of 13)-(9.5x10 to the power of 13)
23) find the quotient and write the answer in standard form
(7.56x10 to the power of -8) divided by 2.1
22) The difference is given as follows: 0.1 x 10^13 = 1000000000000.
23) The quotient is given as follows: 3.6 x 10^-8 = 0.000000036.
How to obtain the difference?
The difference is given as follows:
9.6 x 10^13 - 9.5 x 10^13.
As the two terms have the same base, we just subtract the coefficients while keeping the base constant, hence:
9.6 x 10^13 - 9.5 x 10^13 = (9.6 - 9.5) x 10^13 = 0.1 x 10^13.
How to obtain the quotient?The quotient is given as follows:
7.56 x 10^-8/2.1.
The denominator has an exponent of zero, hence the exponent of the quotient is of - 8 - 0 = 0, and then the coefficient is given as follows:
(7.56/2.1) x 10^-8 = 3.6 x 10^-8 = 0.000000036.
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an electronic product contains 31 integrated circuits. the probability that any integrated circuit is defective is 0.04, and the integrated circuits are independent. the product operates only if there are no defective integrated circuits. what is the probability that the product operates? round your answer to four decimal places (e.g. 0.9876). the probability is
Here you have 31 integrated circuits, each with a probability of 0.04 of being defective is 0.3428
If only one of them is defective, then the electronic product doesnt work.
Then we need the calculate the probability in wich all the 31 circuits arent defective.
the probability for each one to not be defective is 1 - 0.04 = 0.98
And if i want to see the probability for all of them to work fine, then i need to do the product of all the probabilities, this is multiply 0.98 53 times, or:
rounding to the four decimal place, we have: 0.3428
Wich is a kinda small probability for our product to work.
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barbara opened a bag of candies and found that there were 8 red, 6 orange, 4 green, 5 yellow and 3 purple candies in the bag. if barbara pulls out two of the candies at random, what is the probability that the two candies are different colors? express your answer as a common fraction.\
There is a 0.8677 percent chance that the two candies are different colors.
Divide the total number of outcomes by the entire number of possible outcomes to determine the likelihood that an event will occur. There are differences between probability and odds. Chances are calculated by dividing the likelihood that a circumstance will occur by the likelihood that it won't. Probability is a statistic used to assess the likelihood that an event will take place. The likelihood that the coin will land with the heads side up is computed when it is tossed into the air. You are undoubtedly already familiar with this practical application of probability. Before a big trip, we always check the weather prediction.
The probability of two the same
so,
Two red = 8/26 * 7/25
Two orange [tex]=(6/26 * 5/25)[/tex]
Add them up
[tex](8/26 * 7/25)+(6/26 * 5/25)\\=56/650+30/650\\=86/650\\=0.1323[/tex]
Subtract that from 1
[tex]1-0.1323\\=0.8677[/tex]
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ABCD is a quadrilateral.
Angle A = 60° and angle B=50°.
Calculate angles C and D.
A
60°
D
50%
The measure of the angles C and D are 60° and 190° respectively.
What is a quadrilateral?A quadrilateral is a closed object in geometry that is created by connecting four points, any three of which are not collinear. There are 4 sides, 4 angles, and 4 vertices in a quadrilateral.
From the given information the measure of angle c will be,
= [90° - (1/2)m∠A].
= [90° - 30°].
= 60°.
And we know the sum of all the interior angles in a quadrilateral is 360°.
Therefore, The measure of ∠D = 360° - (60° + 50° + 60°).
m∠D = 360° - 170°.
m∠D = 190°.
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an online clothing company sells custom sweatshirts. the company charged 4.99 for shipping plus 5.00 for each sweatshirt. write a linear rule that modesl the todal cost y in dollars for any number of sweatshirts x.
The linear function is 8.50x + 5.50 and a $5.50 delivery fee would be included in the price of each hoodie purchased.
Part 1
The linear function rule is used in cases with only one shipping charge.
= 8.50x + 5.50, where x is the number of sweatshirts and y is the total cost in dollars.
Part 2
The linear function rule would be y = 8.50x + 5.50x = 14x, where y is the total cost in dollars and x is the number of sweatshirts if the shipping fee is applied to each sweatshirt. This implies that the $5.50 delivery fee would be included in the price of each hoodie purchased.
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wall posters are usually sold curled up in cylindrical cardboard tubes. if the length of the tube is 84.5cm and the diameter of the tube is 2.40 cm, what is the area of the poster in cm2?
If the length of the tube is 84.5cm and the diameter of the tube is 2.40 cm, then area of poster is 636.7 cm² ~ 637 cm²
Given that ;
Length of the cylinder = 84.5 cm
Diameter of the cylinder = 2.40 cm
Then the radius is 1.20 cm
When the poster is uncurled it is in rectangle shape so, length of the poster is 84.5cm.
When poster is curled in cylinder, circumference of circle is breadth of poster = 2πr = 2(22/7)1.2 = 7.53 cm
So the area of poster is length × breadth
Area = 84.5cm × 7.53cm
Area = 636.7 cm²
Hence the area of poster is 636.7 cm² ~ 637 cm²
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Which is a true statement about the graph shown?
Answer:
D
Step-by-step explanation:
its not a function because for example for "x=1" or any other basically you would have two values for y and that cant be
Which of the following is the vertex of y=-3x^2-18x-24
Answer:
vertex is at (-3, 3)
No choices provided; can't help you there
Step-by-step explanation:
General equation of a parabola isy = ax² + bx + c
If a < 0 (negative) then it is a downward facing parabola and the vertex is a maximum
If a > 0 then it is an upward facing parabola and the vertex is a minimum
Given parabola is
y = -3x² - 18x -24
and comparing to the general equation we get a = -3, b = -18 and c = -24
So the vertex is a maximum
The x-coordinate of the vertex is given by
[tex]x_v =- \dfrac{b}{2a}\\\\[/tex]
Plugging in values of a = -3 and b = -18 we get
[tex]x_v=-\dfrac{\left(-18\right)}{2\left(-3\right)}\\\\\rightarrow -\dfrac{-18}{-6} = -(3) = -3\\\\[/tex]
To find [tex]y_v[/tex], the y-coordinate of the vertex, plug this value of [tex]x_v[/tex] into the parabola equation and solve for y
[tex]y_v=-3\left(-3\right)^2-18\left(-3\right)-24\\\\y_v = -3(9) +54 -24\\\\y_v = -27 + 54 - 24\\\\y_v = 3\\\\[/tex]
So the vertex is at (-3, 3)
No choices provided so unable to help in that regard
Which of the following represents the total area of the figure?
44 ft²
400 ft²
440 ft²
484 ft²
Answer:
484 ft²
Step-by-step explanation:
The area of the given figure= area of right angled triangle ABC + area of rectangle BCDE + area of triangle DEF
=1/2 * base*height+ length*height+ 1/2*base*height
here base of triangle is equal to height of triangle ABC
=1/2*8*22+22*16+1/2*22*4
=484 ft²
help???? please please!! it’s prob easy
Answer:
$993.3
Step-by-step explanation:
you just multiply 70×14.19
the first type of matched-pairs sample is characterized by a measurement, an intervention of some type, and then another measurement. we generally refer to these experiments as:
A matched-pairs sample experiment is a type of observational research method where two related variables (e.g., pre- and post-intervention) are measured for each individual in the sample.
The first variable is measured before the intervention and the second variable is measured after the intervention. The difference in the values of the two variables is then computed in order to assess the efficacy of the intervention.
The formula used to calculate the difference between the two values is:
Difference = Post Variable - Pre Variable
For example, if the pre-intervention measurement is 25 and the post-intervention measurement is 35, then the difference between the two measurements is 10. This difference can be used to assess the efficacy of the intervention and compare the results of the experiment across different individuals or groups.
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1.6 multiplied by
0.125
The numeric value of 1.6 multiplied by 0.125 is 0.2.
What are mathematical operations?The term "operation" in mathematics refers to the process of computing a value utilizing operands and a math operator. For the specified operands or integers, the math operator's symbol has predetermined rules that must be followed. In mathematics, there are five basic operations: addition, subtraction, multiplication, division, and modular forms.
Given we need to calculate the value of 1.6 multiplied by 0.125
Since Multiplication is one of the four basic arithmetic operations, alongside addition, subtraction, and division. In math, multiply means the repeated addition of groups of equal sizes.
Thus,
=> 1.6 multiplied by 0.125
=> 1.6 * 0.125
=> 0.2
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20 masons working 8 hours a day can build a boundary in 15 days. how many days will 15 masons working 10 hours a day, build a same wall?
The number of days for 15 masons is 16 days
How to determine the number of daysFrom the question, we have the following parameters that can be used in our computation:
20 masons working 8 hours a day can build a boundary in 15 days.
This means that
Boundary wall = 20 * 8 * 15 = 2400
15 masons working 10 hours a day means
Duration = 15 * 10 = 150 hours
So, we have
Days = 2400/150
Days = 16
Hence, the number of days is 16
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I need answer ASAP the question is in the picture
Answer:
c
Step-by-step explanation:
[tex]\text{x}^2 + \frac{1}{4}\text{x} + \frac{1}{64}[/tex]
==============================================
Reason:
The formula you can use is
[tex](a+b)^2 = a^2+2ab+b^2[/tex]
This is the perfect square trinomial formula.
In this case,
a = xb = 1/8The square of each gets us
a^2 = x^2b^2 = (1/8)^2 = 1/64Those form the outer terms, aka 1st and 3rd terms.
The 2ab term in the middle would be 2*x*(1/8) = (1/4)x
That leads us to be able to say [tex]\left(\text{x}+\frac{1}{8}\right)^2 = \text{x}^2 + \frac{1}{4}\text{x} + \frac{1}{64}[/tex]
You can use the FOIL rule or the box method as two ways to verify this answer. Also a graphing calculator can be used.
lake trail is 4 3/5 miles long. outlook trail is 5 5/6 miles long. pinewoodd trail is 1 3/10 miles longer, which trail is longer, pinewoods trail or outlook trail?
The longer trail is outlook trail.
What are Mixed Fractions?Mixed fractions are type of fractions which consist of a whole number part and a fractional part.
Mixed fractions are of the form a b/c where a is the whole number part and b/c is the fractional part.
The lengths of these trails are given in the mixed number form.
First, converting it into improper fraction,
Length of lake trail = 4 3/5 mile = (4 × 5 + 3) / 5 = 23/5 miles
Length of outlook trail = 5 5/6 mile = (5 × 6 + 5) / 6 = 35/6 miles
Length of pinewood trail = 1 3/10 mile = (1 × 10 + 3) / 10 = 13/10 miles
35/6 > 13/10
Outlook trail is longer.
Hence the outlook trail is the longer trail.
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Write an equation in point-slope form for the line through the given point with the given slope.
(0, 3); m = 18
The equation of the line in slope-intercept form is y = 18x + 3.
What is an equation of a line?The equation of a line is given by:
y = mx + c
where m is the slope of the line and c is the y-intercept.
Example:
The slope of the line y = 2x + 3 is 2.
The slope of a line that passes through (1, 2) and (2, 3) is 1.
We have,
The equation of the line in slope-intercept form is y = mx + c.
Now,
m = 18
(0, 3) = (x, y)
So,
y = mx + c
3 = 18 x 0 + c
c = 3
Now,
y = 18x + 3
Thus,
y = 18x + 3 is the equation of the line in slope-intercept form.
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What is 58% of 18
what show your work on how you got the answer
Answer:
10.44
Step-by-step explanation:
part(p)=%*whole
so 58% * 18 = 10.44 or .58 * 18 = 10.44
Solve the system of equations and confirm the accuracy of your estimate.
The point of intersection is (1.82, 1.45).
The equations of the two lines are:
y = 0.8x and y = -2.5x + 6.
What is an equation of a line?The equation of a line is given by:
y = mx + c
where m is the slope of the line and c is the y-intercept.
Example:
The slope of the line y = 2x + 3 is 2.
The slope of a line that passes through (1, 2) and (2, 3) is 1.
We have,
The equation of a line is given by:
y = mx + c
From the graph,
Take two coordinates from each line.
One line:
(0, 0) and (2.5, 2)
m = (2 - 0) / (2.5 - 0)
m = 2/2.5
m = 0.8
(0, 0) = (x, y)
0 = 0.8 x 0 + c
c = 0
So,
y = 0.8x
Another line:
(2, 1) and (1, 3.5)
m = (3.5 - 1) / (1 - 2)
m = 2.5 / -1
m = -2.5
(2, 1) = (x, y)
1 = -2.5 x 2 + c
1 = -5 + c
c = 1 + 5
c = 6
So,
y = -2.5x + 6
Now,
The point of intersection is (1.82, 1.45).
0.8x = -2.5x + 6
0.8x + 2.5x = 6
3.3x = 6
x = 6/3.3
x = 1.82
And,
y = 0.8x
y = 0.8 x 1.82
y = 1.45
Thus,
(1.82, 1.45) is the point of the intersection.
y = 0.8x and y = -2.5x + 6 are the equation of the line.
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