Each week in the library Mrs. Hoskins features popular books in the display. This week includes 3 mystery books, 4 biographies, 6 sci fi books 2 dystopian society books. Jack randomly choose one book to read .What is the theoretical probability that it is a biography

Answers

Answer 1

4/15

select/all
4 bib / all 15

Related Questions

The stem-and-leaf plot displays data collected on the size of 15 classes at two different schools.

Mountain View School Seaside School
0 5, 8
9, 8, 2, 0 1 0, 1, 2, 5, 6, 8
8, 7, 6, 5, 5, 4, 4, 3, 1, 0 2 5, 5, 7, 7, 8
0 3 0, 6
Key: 2 | 1 | 0 means 12 for Mountain View and 10 for Seaside

Part A: Calculate the measures of center. Show all work. (2 points)

Part B: Calculate the measures of variability. Show all work. (1 point)

Part C: If you are interested in a smaller class size, which school is a better choice for you? Explain your reasoning. (1 point)

Answers

To calculate the measures of center, we need to find the mean and median for each school.

For Mountain View School:
Data: 0, 0, 0, 0, 1, 2, 3, 4, 4, 5, 5, 5, 5, 6, 7, 8, 8, 8, 9
Mean: (0 + 0 + 0 + 0 + 1 + 2 + 3 + 4 + 4 + 5 + 5 + 5 + 5 + 6 + 7 + 8 + 8 + 8 + 9) / 19
= 100 / 19
≈ 5.26

To find the median, we need to arrange the data in ascending order: 0, 0, 0, 0, 1, 2, 3, 4, 4, 5, 5, 5, 5, 6, 7, 8, 8, 8, 9.
The median is the middle value, which is the 10th value in this case.
Median: 5

For Seaside School:
Data: 0, 0, 0, 1, 1, 2, 2, 4, 5, 5, 5, 5, 6, 7, 7, 8, 8, 8, 9
Mean: (0 + 0 + 0 + 1 + 1 + 2 + 2 + 4 + 5 + 5 + 5 + 5 + 6 + 7 + 7 + 8 + 8 + 8 + 9) / 19
= 80 / 19
≈ 4.21

To find the median, we need to arrange the data in ascending order: 0, 0, 0, 1, 1, 2, 2, 4, 5, 5, 5, 5, 6, 7, 7, 8, 8, 8, 9.
The median is the middle value, which is the 10th value in this case.
Median: 5

Now let's calculate the measures of variability, specifically the range and interquartile range (IQR).

Range: The range is the difference between the largest and smallest values in the dataset.

For Mountain View School:
Range: 9 - 0 = 9

For Seaside School:
Range: 9 - 0 = 9

Interquartile Range (IQR): The IQR is the difference between the third quartile (Q3) and the first quartile (Q1) and measures the spread of the middle 50% of the data.

For Mountain View School:
Q1 = 3
Q3 = 7
IQR = Q3 - Q1 = 7 - 3 = 4

For Seaside School:
Q1 = 2
Q3 = 7
IQR = Q3 - Q1 = 7 - 2 = 5

To determine which school is a better choice for a smaller class size, we can consider both the mean and the median.

Both the mean and median for Mountain View School are higher than those for Seaside School. This suggests that, on average, the class sizes at Mountain View School are larger than those at Seaside School. Therefore, if you are interested in a smaller class size, Seaside School would be a better choice

Part A:

For Mountain View School:
- Median: The median class size is the middle value, which is 25.
- Mean: The mean class size is the sum of all the class sizes divided by the total number of classes, which is (29 + 28 + 28 + 27 + 25 + 24 + 24 + 23 + 21 + 20 + 19 + 18 + 15 + 13 + 10) / 15 = 21.27.

For Seaside School:
- Median: The median class size is the middle value, which is 20.
- Mean: The mean class size is the sum of all the class sizes divided by the total number of classes, which is (25 + 25 + 27 + 27 + 28 + 28 + 28 + 30 + 31 + 35 + 36 + 38 + 40 + 43 + 45) / 15 = 31.13.

Part B:

For Mountain View School:
- Range: The range is the difference between the largest and smallest values, which is 29 - 10 = 19.
- Interquartile Range (IQR): The IQR is the difference between the third quartile (Q3) and the first quartile (Q1). From the stem-and-leaf plot, we can see that Q1 is 20 and Q3 is 28. Therefore, the IQR is 28 - 20 = 8.

For Seaside School:
- Range: The range is the difference between the largest and smallest values, which is 45 - 25 = 20.
- Interquartile Range (IQR): The IQR is the difference between the third quartile (Q3) and the first quartile (Q1). From the stem-and-leaf plot, we can see that Q1 is 27 and Q3 is 38. Therefore, the IQR is 38 - 27 = 11.

Part C:

If you are interested in a smaller class size, Mountain View School is a better choice for you because it has a lower mean and median class size than Seaside School.

The altitude at which we boil an egg affects how long it takes for the egg to achieve perfect hardness. It takes 198 seconds to boil a perfect egg at the lowest place possible, the edge of the Dead Sea, which has an altitude of −418 meters. The highest place possible is the summit of Mount Everest which has an altitude of 8848 meters. It takes 209 seconds to boil a perfect egg there. T(a) models the time (in seconds) it takes to boil a perfect egg at an altitude of a meters. Which number type is more appropriate for the domain of T? What's the appropriate domain?

Answers

Answer:

198

Step-by-step explanation:

198

The answer for this would be 274

In 1990 first-class mail cost $0.25 for the first ounce or fraction and $0.20 for each additional ounce or fraction. Annette sent two letters. One weighed 3 ounces. The other weighed 5 1/2 ounces. What was the total cost?

Answers

Simple Answer: $1.75 c:

Answer:

Simple Answer: $1.75

Step-by-step explanation:

Reggie works at Bright Bouquets flower shop.

Yesterday, he made 4 centerpieces, which would normally use up an entire shipment of roses. In the shop's latest shipment,

12 roses were wilted, so Reggie couldn't use them. He used the remaining 36 roses in the centerpieces.

Which equation can you use to find how many roses, x, Reggie normally uses in a centerpiece?:?????????? HELP

Answers

Answer:

He normally uses 12 roses in a centerpiece

Step-by-step explanation:

The equation he can use will be,

4x - 12 = 36

4x = 48

x = 12

(36+12)divided by 4=x
X= 12
48dividedby4=x

someone help me please

Answers

Answer:

Line c is the line that passes through the most points, so I think it's c.

Hope this helps :)

Definitely has to be line c!

Hurry, please?

Its math thats all

Answers

Answer:

Below.

Step-by-step explanation:

3^3 = 27

and 4^3 = 64, so the answer will be between 3 and 4 on the number line.

Looks like Lin took the square root of 49 instead of the cube root.

3^3 = 27 i believe.

what value of x makes this equation true -(x+3)=2(x-3)

A. 0
B. 1
C. 2
D. 3

Answers

Answer:

To solve the equation -(x + 3) = 2(x - 3) for x, we can follow these steps:

Step 1: Distribute the negative sign on the left side of the equation:

-(x + 3) = 2(x - 3)

=> -x - 3 = 2(x - 3) (using the distributive property)

Step 2: Expand the right side of the equation:

-x - 3 = 2x - 6

Step 3: Add x to both sides of the equation to isolate the x term on one side:

-x + x - 3 = 2x + x - 6

=> -3 = 3x - 6

Step 4: Add 6 to both sides of the equation:

-3 + 6 = 3x - 6 + 6

=> 3 = 3x

Step 5: Divide both sides of the equation by 3 to solve for x:

3/3 = 3x/3

=> 1 = x

So, the correct value of x that makes the equation true is B. 1.

PLEASE MARK BRAILYISTT :D

Answer:

B, one

Step-by-step explanation:

In order to solve this, you can solve the equation. First, you can use the distributive property to get -x-3=2x-6. If you make the variables on one side and the constants on the other, you will get -3x-3=-6. This can further simplify to -3x=-6. Divide both sides by -3 to get that x=1. Then, the correct answer is B.

Which net represents the figure?

Answers

Answer:

it's the first one with the 3 triangles it closes to make a pyramid

It’s the first answer because the four triangles around the edges of the bottom would meet together to form a pyramid. Please Brainliest.

Louis and charlene have $40. Charlene has $15 more than Louis. How much money does Charlene have?

Answers

Charlene has $55

Step-by-step explanation:

40+15 = 55

63.1% of 80 is what?

Answers

50.48 did this help yes no ?

are you sure you didn’t type the wrong numbers? I got 50.48 too

Gasoline in Mexico is measured in liters. One gallon is equal to 3.785 liters.

How many liters would it take to fill a 19-gallon tank? Round your answer to the nearest thousandth.

Answers

Answer:

71.915

Step-by-step explanation:

71.915 is the answer

You pick a card at random. 6 7 8 9 What is P(divisor of 70)? Write your answer as a percentage. %

Answers

Answer:

Step-by-step explanation:

6.789x10 3 esta es la solución

You have a pizza with diameter 12
2
3 in., and a square box that is 12.65 in. across. Write 12
2
3 as a decimal. Can you fit the pizza inside the box?
What is the decimal expansion for 12
2
3?
A.12.6
B.12.65
C.12.6
D.12.66
pls help me

Answers

Answer:

D is the right choice and no you cannot fit the pizza inside the box.

Step-by-step explanation:

D is the answer because to turn 2/3 into a decimal you would divide 2 by 3 and the answer you would get would be 0.66666666666...You would then add 12 to the answer and get 12.6666... Once you get this answer you would round it to the hundredths to get 12.67 but since that is not an option you could use D, 12.66 inches.

Answer:

I believe the answer is D.

Step-by-step explanation:

GOOGLE

What is the value of x?

A. 7
B. 10
C.18
D. 22

Answers

the answer would be c

Answer:

Step-by-step explanation:

Since all the expressions are on a straight angle (equalling 180) combine the expressions to form on big expression that is equal to 180 and solve.

6x - 10 + 4x + 6 + 7x + 14 = 180

17x + 10 = 180

- 10 -10

17x = 170

÷17 ÷17

x = 10

Hope this helps

The monthly cost (in dollars) of a long-distance phone plan is a linear function of the total calling time (in minutes). The monthly cost for 51 minutes of calls is $17.32 and the monthly cost for 79 minutes is $20.96. What is the monthly cost for 66 minutes of calls? Please add a step-by-step explanation, if possible.

Answers

Answer:

The monthly cost (in dollars) of a long-distance phone plan is a linear function, which means that the cost is proportional to the total calling time (in minutes). To calculate the monthly cost for 66 minutes of calls, we can use the following equation:

Cost = m * Minutes + b

Where m is the slope of the line, and b is the y-intercept. To find m and b, we can use the two given points: (51, $17.32) and (79, $20.96).

Using the slope formula: m = (20.96 - 17.32)/(79 - 51) = 0.44

We can then use the y-intercept formula: b = 17.32 - 0.44*51 = -4.64

Now we can plug in 66 for Minutes and solve for Cost: Cost = 0.44*66 - 4.64 = $17.12

Therefore, the monthly cost for 66 minutes of calls is $17.12.

The a answer is $17.12

Explain the cosine rule and sine rule while also saying how to use it and provide examples (keep it in simple terms)

Answers

Answer:

Sure, I'll explain the cosine rule and sine rule in simple terms:

The cosine rule (also known as the law of cosines) is used to find the length of a side or the measure of an angle in a triangle given the lengths of the other sides and the angle between those sides. It states that c^2 = a^2 + b^2 - 2ab cos(C), where c is the length of the side opposite angle C, and a and b are the lengths of the other two sides.

Here's an example of how to use the cosine

Suppose we have a triangle with sides a=6, b=8, and an angle between them c=45 degrees. We want to find the length of the remaining side of the triangle, side a.

Using the cosine rule:

a^2 = b^2 + c^2 - 2bc * cosA

where A is the angle opposite side a, we can plug in our values and solve for a:

a^2 = 8^2 + 6^2 - 2(8)(6) * cos(45)

a^2 = 64 + 36 - 96 * 0.707

a^2 = 10.56

a = sqrt(10.56)

a = 3.25 (rounded to two decimal places)

Therefore, the length of side a is approximately 3.25 units.

Answer:

Step-by-step explanation:

I'M SORRY WHAT IS THY ANSEWR?

Answers

I think the answer would be 1/36.

Because there’s 36 possible solutions between the 2 dice and only one of those could get you a sum of 2. So 1 out of 36 or 1/36.

1/36 would be your answer!

Manny uses a sprinkler system to water his lawn. Each lawn sprinkler sprays a distance of 9 feet in every direction. One lawn sprinkler is broken and is only spraying two thirds of the area it usually covers. How many square feet of the yard is being watered by the broken sprinkler? Leave the answer in terms of π.

6π square feet
12π square feet
27π square feet
54π square feet

Answers

54(pi) ft^2

9 is the radius
A = (pi)r^2

A = 81(pi)
81(pi) * 2/3 = 54(pi) ft^2

It would be the first one, A. 9 is the radius and you times it by 2/3 and you get 6

look at the pic below

Answers

Answer: Read Below Please

Step-by-step explanation:

Split up 3 and 1/5 first.

3$\frac{1}{5}$x$\frac{2}{3}$=3x$\frac{2}{3}$+$\frac{1}{5}$x$\frac{2}{3}$

You solve that and you get:

$\frac{6}{3}$+$\frac{2}{15}$

6/3 is 2 then you add 2 + 2/15
The answer at the end would be 2$\frac{2}{15}$.

Answer:

I tried myself and found it hard the teacher who gave you that I would ask for help on the questions your stuck on

Step-by-step explanation:

By what factor will the volume of the right regular pyramid be multiplied if the height remains the same but the sides of the base are multiplied by a factor of 3?

pls a need help

Answers

Answer:

33333333333333333333

Well a factor of three can only be a 1 or a 3

Different sizes of string needs to be cut to go around various shapes. All of the following sizes are in inches.
π √2 4√4 √16
A. Without using your calculator, approximate the decimal equivalent of each number to the nearest tenth.
B. Order the string sizes from least to greatest.

Answers

A.

Pi = 3.1
Sqrt of 2 = 1.4
Sqrt of 4 times 4 = 8
Sqrt of 16 = 4

B.

Least to greatest:

Square root of 2

Pi

4 Times Square root of 4

Square root of 16

Please help me!!!!!!

Answers

Answer:

this is the answer :621cm²

Step-by-step explanation:

23×27=621cm²

Answer:

Step-by-step explanation:

Area of the parallelogram = Area of rectangle

bh = lb

We can make a rectangle from a parallelogram.

So, Area of parallelogram = bh

27*23

= 621 sq. cm

Hope it helped. Pls mark me the BRAINLIEST!

Please Help Me With This Math!!

Answers

The answer would be 20%

I think 20 sorry if i am not correct

4x (2x® - 7x2 + x)
O 8x4 - 28x3+4x2
o 16x - 7x2 +4x
o 8x4 - 7x2 + x
o 16x4 - 3x3+4x2

Answers

Answer:

8x^4 - 28x^3 + 4x^2.

Step-by-step explanation:

4x(2x^3 - 7x^2 + x)

= 4 * 2x^3 + 4x*-7x^2 + 4x*x

= 8x^4 - 28x^3 + 4x^2.

Answer:

8$x^{4}$-28x³+4x²

Step-by-step explanation:

4x(2x³-7x²+x)=

8$x^{4}$-28x³+4x²

2x³ × 4x = 8$x^{4}$

7x² × 4x = 28x³

x × 4x = 4x²

Jen got 18 out of 21 questions on a test (missed 3 questions). What is their percent grade. How did you find the answer?

Answers

Simplify the fraction “18/21” into “6/7” (divide numerator & denominator by 3), and then input that into your calculator. You get 0.85714286, which rounds to about 0.86. Then you multiply by 100 to make it a percent. The answer is 86%.

Word Problems (WITH EXPLANATION)

In the rectangle below, the line MN cuts the rectangle into two regions. Find x, the length of segment NB, so that the area of the quadrilateral MNBC is 40% of the total area of the rectangle.

Answers

The length of segment NB is 0.833

Finding x, the length of segment NB

From the question, we have the following parameters that can be used in our computation:

The rectangle

The area of the rectangle is

Area = (20 + x) * 10

The area of MNBC is

Area = 1/2 * 10 * (x + 20 + x - 5)

Area = 5(2x + 15 )

The area of the quadrilateral MNBC is 40% of the total area of the rectangle

So, we have

5(2x + 15) = 40% * (20 + x) * 10

5(2x + 15) = 4* (20 + x)

When evaluated, we have

x = 0.833

Answers

Answer:

explanation:

10+5+5 = 20

5+2+2 = 9

10+5+1 = 16

This is answer of 5 number..

The dimensions of this figure are changed so that the new surface area is exactly 12 what it was originally.

What is the new surface area?

Enter your answer as a decimal in the box.

Answers

*see the attached picture for the color guide*

RED: 3.8 x 4.3 = 16.34 x 2 = 32.68

ORANGE: 8.4 x 2 = 16.8 x 2 = 33.6

YELLOW: 4.3 x 10.1 = 43.43

GREEN: 2 x 10.1 = 20.2

*this one will take an extra step*
BLUE: 8.4 - 3.8 = 4.6 x 10.1 = 46.46

PURPLE: 3.8 x 10.1 = 38.38

Now we have to remember to do the ones we can’t see:

BACK: 10.1 x 8.4 = 84.84

*this one will require an extra step*
BOTTOM: 4.3 + 2 = 6.3
6.3 x 10.1 = 63.63

So now we have to add all the sides together:

32.68
33.6
43.43
20.2 +
46.46
38.38
84.84
63.63
——————
= 363.22

There’s you’re answer :)

Select all the sets of three side lengths that will make a triangle.
2, 3, 4
2, 3, 5
2, 3, 6
3, 4, 5
3, 4, 8

Answers

Correct tho♥️ that great

Solve the side angel for x.

Answers

Answer:

x=80

Step-by-step explanation:

a^2+b^2=c^2

48^2+64^2=x

2304+4096=x

6400=√x

√ to get x alone

80=x

X=80 hope this helps

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