By using CDF \(P(X \le 1)\), \(P(0.5 \le X \le 1)=0.1875\) , \(\mu= 1.4142\), density function f(x) is \(0\) \(, E(X)=1 , V(X) = 1,\) the expected charge \(E[h(X)]=2.\)
(a) To obtain CDF
\(P(X \le 1)\)
We have:
\(P(X \le 1) = F(1) = (1^2)/4 = 0.25\)
(b) \(P(0.5 \le X \le1)\)
We have:
\(P(0.5 \leX \le 1) \\ =F(1) - F(0.5) \\= (1^2)/4 - (0.5^2)/4 \\ =0.1875\)
(c) \(P(X > 1.5)\)
We have:
\(P(X > 1.5) \\= 1 - F(1.5) \\= 1 - (1.5^2)/4 \\= 0.1094\)
(d) The median checkout duration [solve 0.5 = F(μ)]
To find the median, we need to solve the equation 0.5 = F(μ) for μ. This means we need to solve:
\(0.5 = (\mu^2)/4\)
\(\mu^2= 2\)
\(mu = \sqrt(2) \approx 1.4142\)
(e) Use F'(x) to obtain the density function f(x)
We have:
\(f(x) = F'(x) \\= d/dx [(x^2)/4]\\ = x/2, 0 \le x \le 2\)
\(f(x) = 0\), otherwise
(f) Calculate \(E(X)\)
We have:
\(E(X) = \int\ x f(x)dx\) from 0 to 2
\(E(X) = \int\ x(x/2)dx\) from 0 to 2
\(E(X) = [x^3/6]\) from 0 to 2
\(E(X) = (2^3/6)\)
\(E(X) = 1\)
(g) Calculate V(X) and σx
We have:
\(V(X) = E(X^2) - [E(X)]^2\)
\(V(X) = \int\x^2f(x)dx\) from 0 to 2 - [E(X)]²
\(V(X) = \int\x^2 (x/2)dx\) from 0 to 2 - 1²
\(V(X) = [x^4/8]\) from 0 to 2 - 1
\(V(X) = (2^4/8) - (0^4/8) - 1\)
\(V(X) = 1\)
Therefore, \(\sigma x = \sqrt{(V(X))} = \sqrt{(1)} = 1.\)
(h) If the borrower is charged an amount \(h(X) = X^2\) when checkout duration is X, compute the expected charge E[h(X)]
We have:
\(E[h(X)] = \int\ h(x)f(x)dx\) from 0 to 2
\(E[h(X)] = \int\x^2(x/2)dx\) from 0 to 2
\(E[h(X)] = [x^4/8]\) from 0 to 2
\(E[h(X)] = (2^4/8) - (0^4/8)\)
\(E[h(X)] = 2\)
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The end of summer Jamie bought a 325 surfboard for $123.50 but what percent was the surfboard mark down?
Answer:
62%
Step-by-step explanation:
Percentage markdown = \(\frac{inital price - new price}{initial price}\) × 100
\(\frac{325 - 123.50}{325}\) x 100
\(\frac{201.50}{325}\) x 100 = 62%
Jana has 2 red pens in her backpack. If this is 25% of the total number of pens, how many
pens are in her backpack?
nts
Select the correct response:
800
0.5
8
1200
Divide number of pens given by percentage:
2/0.25 = 8
She has 8 pens total.
convert 1211.122 in base three to base ten
Answer:
49.629629...
Step-by-step explanation:
1211 = 1 + 3 + 2*3^2 + 1* 3^3
= 4 + 18 + 27
= 49.
0.122
= 1 *3^-1 + 2*3^-2+2*3^-3
= 0.629629....
A 20 N model rocket launched vertically is clocked at 25 m/s when it is 15 m above the ground (and has expended a negligible amount of fuel). Use the work–energy principle to find the rocket’s initial speed.
27.4 m/s
40.2 m/s
17.8 m/s
30.3 m/s
30.3 m/s is the correct answer.
please please help me with number 28 i’ll mark b
Answer:
both
Step-by-step explanation:
given sss, you will need to use Law of Cosines.
However, one you get one of the angles, the easiest way to solve for the second angle is to just use law of sines.
Mrs. Katz is planning to create a flower
garden in the shape of a trapezoid.
She started by creating a blueprint.
What is the value of x?
The value of x can be found by using the formula for the area of a trapezoid. The value of \($x$\) is \($4$\) inches.
What is area?Area is a two-dimensional measurement that is used to measure the size of a shape or surface. It is measured in square units, such as square centimeters, square meters, square kilometers, and so on. The formula for the area of a trapezoid is: \((a+b)/2 *h\), where a and b are the lengths of the parallel sides, and h is the height. Mrs. Katz needs to calculate the value of x by plugging in the lengths of the parallel sides and the height into the formula.
We know that the opposite sides of a trapezoid are parallel, so we have \(AB \parallel DC.\)
Using the given information, we can set up an equation in terms of \($x$\) and solve for it. We know that the height of the trapezoid is \($8$\) inches, and we know that the bases are \($x$\) inches and \($16$\) inches.
Using the formula for the area of a trapezoid, we have:
\(\text{Area} = \frac{1}{2}(AB+DC)(\text{height})\)
Plugging in the values we know, we get:
\(\text{Area} = \frac{1}{2}(x+16)(8)\)
We are also given that the area of the trapezoid is \($100$\) square inches, so we can set up an equation:
\(100 = \frac{1}{2}(x+16)(8)\)
Simplifying and solving for \($x$\), we get:
\(100 &= \frac{1}{2}(x+16)(8)\20 &= (x+16)\x &= 4\)
Therefore, the value of \($x$\) is \($4$\) inches.
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Help me solve this pleaseeee
The surface area of the prism in this problem is given as follows:
S = 636 m².
What is the surface area of a rectangular prism?The surface area of a rectangular prism of height h, width w and length l is given by:
S = 2(hw + lw + lh).
This means that the area of each rectangular face of the prism is calculated, and then the surface area is given by the sum of all these areas.
The figure for this problem is composed as follows:
Rectangular prism of dimensions 14 m, 6 m and 7 m.Rectangular prism of dimensions 4 m, 6 m and 7 m.Hence the surface area for this problem is given as follows:
S = 2 x (14 x 6 + 14 x 7 + 6 x 7 + 4 x 6 + 4 x 7 + 6 x 7)
S = 636 m².
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A car travels 2 3/4 miles in 4 1/2 minutes. How many miles does the car travel in 1 minute?
There are 11/18 miles does the car travel in 1 minute.
What is an expression?Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.
Given that;
A car travels 2 3/4 miles in 4 1/2 minutes.
Now,
Since, A car travels 2 3/4 miles in 4 1/2 minutes.
Hence, The distance cover by car in 1 minute = 2 3/4 ÷ 4 1/2
= 11/4 ÷ 9/2
= 11/4 × 2/9
= 11/18 miles
Thus, The car travel 11/18 miles in 1 minute.
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Example 19: Find angle x, y and z ? 56°
Answer:
x = 124
y = 56
z = 124
Step-by-step explanation:
Vertical angles are congruent (equal) , so Y and angle of 56° are equal
angles x and angle of 56° are equivalent to 180° , so
180 - 56 = 124° -> x = 124°
angle x and z are vertical angles (such as that of y and angle of 56°) so they are equivalent! Making Z = 124°
Answer :-
x = 124°
y° = 56°
z° = 124°
Step-by-step explanation :-
x and 56° are linear angles.
Sum of linear pair of angles is always 180°
x + 56 = 180
x = 180 - 56
x = 124° _____(i)
Opposite angles are always equal :-
56° = y x° = z°y° = 56°
From eqn (i) we have , x = 124°
x = z°
z° = 124°
When two lines intersect, we have following results.
Opposite angles formed are equal.Angle sum in a line is 180°The sum of angles around a point is 360°.If two angles are said to be complementary, then the sum of the two angles is 180°.Also, two angles are complementary means, the sum of the two angles is 90°When you design an algorithm, it should be general enough to provide a solution to many problem instances, not just one or a few of them.T/F?
It is true that when you design an algorithm, it should be general enough to provide a solution to many problem instances, not just one or a few of them.
In mathematics, an algorithm is a process, a description of a series of steps that may be used to solve a problem; however, they are now far more prevalent than that.
Although many areas of research (and daily life) employ algorithms, long division's step-by-step process is probably the most prevalent example.
Thus, It is true that when you design an algorithm, it should be general enough to provide a solution to many problem instances, not just one or a few of them.
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when two dice are thrown, what is the probability that their numbers are different? round to the nearest hundredth.
The probability for getting the different numbers when two dice are thrown is: 5/6.
Explain the term sample space?The catalog of all potential outcomes of such an experiment is referred to as the sample space. Regardless of the number many ways an event could occur, each potential result is symbolized by a single point with in sample space. For instance, the results of the experiment using a simple fair dice throw are used to create the sample space.The sample space formed by rolling two dice are: 6*6 = 36.
Total number of pairs having same number = (1,1), (2,2),(3,3),(4,4),(5,5),(6,6) = 6 samples.
Thus,
Number of outcomes having different numbers:
36 - 6 = 30
Probability (different numbers) = total number of different number / total outcomes.
Probability (different numbers) = 30 / 36
Probability (different numbers) = 5/6
Thus, the probability for getting the different numbers when two dice are thrown is: 5/6.
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For every 3 minutes that Ryan runs on the treadmill, he burns 28
calories. How many calories can he expect to burn if he runs for 24
minutes?
Answer:
He will burn 224 calories.
Step-by-step explanation:
Multiply 8 by 28 to get your answers because he runs 8 times more in 24 minutes.
:))
What expression should be used to access the first element of an array of integers called numbers? What expression should be used to access the last element of numbers, assuming it contains 10 elements? What expression can be used to access its last element, regardless of its length?
To access the first element of an array of integers called "numbers," you can use the expression:
numbers[0]`
This expression uses the array name "numbers" and the index "0" to access the first element.
To access the last element of "numbers," assuming it contains 10 elements, use the expression:
`numbers[9]`
Here, we use the index "9" since arrays are zero-indexed, meaning the last element in a 10-element array has an index of 9.
To access the first element of the array called numbers, we would use the expression "numbers[0]."
To access the last element of the array, assuming it contains 10 elements, we would use the expression "numbers [9]" since arrays are zero-indexed in most programming languages.
To access the last element of the array regardless of its length, we can use the expression "numbers [numbers.length-1]," which subtracts 1 from the length of the array to access the last element.
To access the last element, regardless of its length, use the expression:
'numbers [numbers. length - 1]'
This expression uses the "length" property of the array to find the total number of elements and subtracts 1 to get the correct index for the last element.
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Need help with this pls
Answer:
num 1 is answer...
Suppose that the score of 67 was changed to 27 so that the scores obtained were 49,53,27,20,27,36,49,27,61, and 28 . What is the mean of this new set of scores? Ww transcribed data
The mean of the new set of scores can be calculated by summing up all the scores and dividing it by the total number of scores. In this case, the scores obtained are 49, 53, 27, 20, 27, 36, 49, 27, 61, and 28.
To find the mean, we add up all these scores: 49 + 53 + 27 + 20 + 27 + 36 + 49 + 27 + 61 + 28 = 377.
Since there are 10 scores in total, we divide the sum by 10: 377/10 = 37.7.
Therefore, the mean of the new set of scores is 37.7.
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A dilation changes the size AND the shape of a figure
Alex invested $7,000 in a fund that pays 6% interest. If no deposits or withdrawals are made, how much money will be in the account 8 years from today?
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why is paying back along with a nominal interest rate of 13.62% if the interest is compounded quarterly, how much greater is white effective interest rate than his nominal interest rate
The required white effective interest rate is 0.71% more than his nominal interest rate.
What is compound interest?Compound interest is the interest on deposits computed on both the initial principal and the interest earned over time.
Here,
White Effective interest R,
\(R=(1+i/m)^m)-1\\R=(1+0.1362/4)^4)-1\\R =0.1433*100=\)
R = 14.33 percent
So
Difference in interest = 14.33%-13.62%
=0.71%
Thus, the required white effective interest rate is 0.71% more than his nominal interest rate.
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What is the slope y =- 5x 3?
Parallel lines are two straight lines that never cross. For this to happen, the lines have to have the same slope.
In this case, the equation given is in what's called "slope-intersect" form. The general form of the slope intercept formula is y=mx + b where m is the slope of the line and b is the point on the Y-axis where the line crosses.
The equation given is y=5x+3 and since the 5 is in the place of m from the general equation, 5 is the slope. Since parallel lines have the same slope, 5 is the answer.
Slope-Intercept Form:
When we're given a linear equation we can immediately see if it's in the slope-intercept form if it follows the format y=mx+b. As long as y does not have a coefficient the slope and y-intercept are the values of m and b.
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Which situation can be modeled by the inequality 65-8x>9
Answer:
x<7
Step-by-step explanation:
65-8x>9
-8x>9-65
-8x>-56
x<7
Answer:
x<7
Step-by-step explanation:
65-8x>9
-8x>9-65
-8x>-56
x<7
given g(x)=-x^2+10x-3 find the following,
g(9)
g(-1)
Step-by-step explanation:
g(x) = - x² + 10x - 3
To get the g(9) substitute X in the equation for 9
g(9) = - 9² + 10(9) -3
g(9) = 81 + 90 - 3
g(9) = 171 - 3
g(9) = 168
Similarly to get g(-1)
g(-1) = - (-1)² + 10(-1) - 3
g(-1) = - 1 - 10 - 3
g(-1) = - 14
Interval
Frequency
Stock
analysis.
The price-earning ratios of 100 randomly selected stocks from the New York Stock Exchange are: −0.5−4.5
27
4.5−9.5
33
9.5−14.5
23
14.5−19.5
13
19.5−24.5
1
24.5−29.5
1
29.5−34.5
2
Question content area bottom
Part 1
a. Find the mean of the price-earning ratios. enter your response here
(Type an integer or a decimal. Round to two decimal places.)
The mean of the price-earning ratios is 7.32 (rounded to two decimal places).
To find the mean of the price-earning ratios, we need to calculate the average.
First, let's list the price-earning ratios and their corresponding frequencies:
-0.5 to -4.5 (frequency: 27)
4.5 to -9.5 (frequency: 33)
9.5 to -14.5 (frequency: 23)
14.5 to -19.5 (frequency: 13)
19.5 to -24.5 (frequency: 1)
24.5 to -29.5 (frequency: 1)
29.5 to -34.5 (frequency: 2)
To find the mean, we multiply each price-earning ratio by its frequency, then sum up the products, and finally divide by the total frequency.
Mean = ((-0.5 * 27) + (4.5 * 33) + (9.5 * 23) + (14.5 * 13) + (19.5 * 1) + (24.5 * 1) + (29.5 * 2)) / (27 + 33 + 23 + 13 + 1 + 1 + 2)
Calculating this expression gives us the mean of the price-earning ratios.
Mean = 7.32
Therefore, the mean of the price-earning ratios is 7.32 (rounded to two decimal places).
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a professional basketball player makes 80% of the free throws he tries. assuming this percentage holds true for future attempts, use the binomial formula to find the probability that in the next eight tries, the number of free throws he will make is: a. exactly 8 b. exactly 5 c. 3 or 4
a) The probability that in the next eight tries, the number of free throws he will make exactly 8 is equals to the 0.27249.
b) The probability that in the next eight tries, the number of free throws he will make exactly 5 is equals to the 0.08386.
We have a professional basketball player makes 80% of the free throws he tries.
let X be the number of free throws he will make in the next 8 tries. He makes 80% of the free thwors he tries. So, for binomial distribution, X~Bin(8,0.80)
so the probability mass function of X is P[X =x] = ⁸Cₓ 0.85ˣ (1-0.85)⁽⁸⁻ˣ⁾, x = 0,1, 2,..8
P[ X = x] = 0 otherwise.
a) So, the probability that he makes exactly 8 throws isP,(X=8)
= ⁸C₈(0.85)⁸ (1- 0.85)⁰
=0.27249
b) the probability that he makes exactly 5 throws is, P[X=5]
=⁸C₅0.855(1-0.85)⁽⁸⁻³⁾=56×0.855×0.153
=0.08386
Hence required probability is 0.083.
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Find the slope of the line passing through the points (-6, -5) and (4,4).
Answer:
9/10 or 0.9
Step-by-step explanation:
Slope of a line passing through two points (x1, y1) and (x2, y2) is given by
Slope m = rise/run
where
rise = y2 - y1
run = x2 - x1
Given points (- 6, - 5) and (4, 4),
rise = 4 - (-5) = 4 + 5 = 9
run = 4 - ( - 6) = 4 + 6 = 10
Slope = rise/run = 9/10 or 0.9
Razi is filling bags with party favors for his birthday party. The table to the right shows the number of bags he still needs to fill after 4, 5, 6, and 7 minutes. If he is working at a constant rate, what was the initial number of party favor bags Razi had to fill?
Answer:
52
Step-by-step explanation:
Answer:
52
Step-by-step explanation:
if the dot product of two nonzero vectors is zero, the vectors must be perpendicular to each other. a) true b) false
The statement "if the dot product of two nonzero vectors is zero, the vectors must be perpendicular to each other" is true. The dot product of two vectors is zero if and only if the vectors are perpendicular.
The dot product of two vectors is defined as the product of their magnitudes and the cosine of the angle between them. When the dot product is zero, it means that the cosine of the angle between the vectors is zero, which occurs when the vectors are perpendicular.
In other words, the dot product being zero indicates that the vectors are at a 90-degree angle to each other, supporting the statement that they are perpendicular.
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Solve right triangle
EF =
FG=
Measure E =
The value of the sides are;
FG = 4. 06
EF = 6. 59
<E = 38 degrees
How to determine the valueFrom the information given, we have;
Using the tangent identity;
tan 52 = 5.2/FG
cross multiply the values, we have;
FG = 4. 06
Then,
using the sine identity, we have;
sin 52 = 5.2/EF
cross multiply the values, we get;
EF = 6. 59
To determine the angle E, we have;
sin E = 4.06/6. 59
Divide the values
sin E = 0. 6160
E = 38 degrees
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please answer !!! answeeerrr
Answer: equation is (y5+g(x)
Step-by-step explanation: Percent change = 56 - 32 |32| × 100% = 24 32 × 100 = 75% (increase). Where: 32 is the old value and 56 is the new value. In this case we have a positive
The equation 3600b² = hw represents the relationship among the body surface area b (in square meters), height h (in
centimeters), and weight w (in kilograms) of a person. To the nearest tenth, approximate the body surface area of a person who
is 168 centimeters tall and weighs 60 kilograms.
The body surface area is about (blank)
square meters.
Answer: 0.2 square meters.
Step-by-step explanation:
We are given the equation:
3600b² = hw
We need to find the value of b, given that h = 168 cm and w = 60 kg.
First, we need to convert the height from centimeters to meters:
h = 168 cm = 1.68 m
Substituting the given values:
3600b² = (1.68)(60)
3600b² = 100.8
b² = 100.8/3600
b² = 0.028
Taking the square root of both sides:
b = √0.028
b ≈ 0.167
Rounding to the nearest tenth:
b ≈ 0.2
Therefore, the body surface area of a person who is 168 centimeters tall and weighs 60 kilograms is about 0.2 square meters.
A group of statements that executes as a single unit is a(n) ____.
a. module
b. unit
c. bunch
d. block
The term that describes a group of statements that executes as a single unit is a "block". A block of code is a program that is grouped together and treated as a single unit. So, the correct option is D.
In computer programming, a block is a group of statements or declarations that are enclosed within a set of curly braces ({ }). The block serves as a single unit that is executed together. Blocks are used to organize code and to apply control structures, such as loops and conditional statements, to multiple statements.
A block can contain any number of statements, which can include variable declarations, function calls, loops, conditional statements, and other constructs. The statements within a block are executed in sequence, one after another, unless a control statement is encountered that alters the normal sequence of execution.
For example, a while loop in Java consists of a block of code that is executed repeatedly while a certain condition is true:
while (condition) {
// block of code to be executed while condition is true
}
In this example, the block of code inside the curly braces will be executed repeatedly while the condition specified in the while statement is true. The block can contain any number of statements, and these statements will be executed each time the loop iterates.
Another common use of blocks is to define functions or methods. A function or method is a block of code that can be called from other parts of the program, and can take inputs (arguments) and return outputs. For example, in Python, a function can be defined as follows:
def function(argument1, argument2):
# block of code to be executed in the function
return result
In this example, the block of code enclosed within the function definition is executed when the function is called. The function can take inputs (argument1 and argument2), which can be used within the function, and it can return a result using the return statement.
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