The weights of 12-year old boys are normally distributed with a mean of 89 lbs. If 68% of 12 year old boys are between the weights of 82.7 lbs and 95.3 lbs, what is the standard deviation?
A
34
B
6.3
C
3.5
D
12.6

Answers

Answer 1
This is the answer B. This is because if you want to be treated the way you do treat people.

Related Questions

fin math today PLEASE

Answers

Answer:

1) Area:

So to find area follow the formula

a=πr^2

a=area

π= pi or 3.14 in this situation

r= radius

So we have only the diameter.

To in Find the radius you can divide the diameter by 2 and get the radius which is

84/2=42

3.14*42^2=

Area: 5538.96 ft^2

2) Circumference:

To find the circumfeence you just multiply the diameter by π or in this case 3.14.

c=πd

c= circumference  

d= diameters

3.14*84=

Circumfrence: 263.76 ft

What is the perimeter of the rectangle 2 cm x 2 cm and 1 cm x 1 cm

Answers

Answer:

l=P over 2﹣w

Step-by-step explanation:

A red panda at the zoo eats 1/10 pounds of food
each day. How many days will it take the red panda to eat one pound of food? 6 pounds of food? 56 pounds of food?

Answers

Answer:

a. 10

b.60

c. 560

Step-by-step explanation:

a. 1 times 10

b. 10 times 6

c. 10 times 56

HELP ME PLEASEEEEEEEEEEE

Answers

Answer:

12

Step-by-step explanation:

12/2=6

Tell me if it works

Answer: z=12

Step-by-step explanation: Hope this help :D

PLEASE HELP I DON"T UNDERSTAND

SHOW WORK PLEASE


Part A: The area of a square is (9a2 − 24a + 16) square units. Determine the length of each side of the square by factoring the area expression completely. Show your work. (5 points)

Part B: The area of a rectangle is (25a2 − 36b2) square units. Determine the dimensions of the rectangle by factoring the area expression completely. Show your work. (5 points)

Answers

Answer:

Below in bold.

Step-by-step explanation:

Part A.

9a^2 - 24a + 16

= (3a - 4)(3a - 4).

Length of each side = 3a - 4 units.

Part B.

25a^2 − 36b^2

= (5a - 6b)(5a + 6b).

The dimensions are 5a-6b and 5a+6b.

The length of each side would be 3a - 4 units. The dimensions are 5a - 6b and 5a + 6b.

What is the area of the rectangle?

The area of the rectangle is the product of the length and width of a given rectangle.

The area of the rectangle = length × Width

Part A.

The area of a square is [tex]9a^2 - 24a + 16[/tex] square units.

To determine the length of each side of the square by factoring the area expression completely.

[tex]9a^2 - 24a + 16\\\\= (3a - 4)(3a - 4).[/tex]

The Length of each side = 3a - 4 units.

Part B.

The area of a rectangle is [tex]25a^2 - 36b^2[/tex]square units.

To determine the dimensions of the rectangle by factoring the area expression completely.

[tex]25a^2 - 36b^2\\= (5a - 6b)(5a + 6b).[/tex]

The dimensions are 5a - 6b and 5a + 6b.

Learn more about the area;

https://brainly.com/question/1658516

#SPJ2

Find the measure of the angle indicated in bold

Plss help

Answers

Answer:

Solution given:

9x-4=8+7x[Vertically opposite angle]

9x-7x=8+4

2x=12

x=12/2

x=6

:.8+7x=8+7×6=50°

Answer:

50

Step-by-step explanation:

9x - 4 = 8 + 7x

x = 6

Therefore, 8 + (7 *6) = 50

The measure of the angle is 50

Thenks and mark me brainliest :)))

Which of the following phrases are equations? Choose 2 answers: 3 b = 9 7 + 19 = 26 a + 9 > 72 | 0 ty 1​

Answers

Answer:

B and C

Step-by-step explanation:

Both have = signs

Answer:

B C

Step-by-step explanation:

B C

Please answer this I'm confused with it

Answers

Answer:

x intercepts are (4,0) and (-6,0)

axis of symmetry is x=-1

vertex is (-1,-25)

Step-by-step explanation:

Answer:

x intercepts are (4,0) and (-6,0)

axis of symmetry is x=-1

vertex is (-1,-25)

Step-by-step explanation:

What is 767,000 expresses in scientific notation

Answers

Answer:

767,000 in scientific notation is [tex]7.67*10^5[/tex].

Step-by-step explanation:

A number is written in scientific notation when there is a number greater than or equal to 1 but less than 10 and multiplied by a power of 10. In this case, if 767,000 were to be written in scientific notation, then you need to move the decimal place of the number until you have a number that meets the requirement above. 7.67 would be the number to use, and you need to multiply that by a power of 10 that makes the product the original number, so the power would be 5. So 767,000 in scientific notation would be [tex]7.67*10^5[/tex].

The answer is 767,000

What is the value of x?

Answers

Answer:

X = 1

Step-by-step explanation:

X is none number but equals to 1

Answer:

X=11

Step-by-step explanation:

Similar triangles....

6/48 = 5/3x+7

6(3x+7) =240

3x+7=40

3x=33

x=11

Al resolver la siguiente adición de fracciones 2/3 + 1/2 + 1/8 , se obtiene

Answers

Answer

31/24

Step-by-step explanation:

16/24 + 12/24 + 3/24 = 31/24

Landon is building new bookshelves for his bookstore's new mystery section. Each shelf can hold 36 books. There are 1,188 mystery books.

Answers

Answer:

33 bookshelves

Step-by-step explanation:

I think this question is asking how many shelves he needs, but I am unsure because the question is incomplete.

If there are 1,188 books, and each shelf can hold 36 books, we need to divide.

[tex]number of books[/tex]÷[tex]bookspershelf[/tex]

[tex]1188[/tex]÷[tex]36[/tex]=[tex]33[/tex]

We need 33 bookshelves

Hope this helps :-)

A baker is making apple pies. He uses 24 apples for every 5 pies. How many apples will he need to bake 20 pies?

Answers

96 apples you multiply 24x4 for the answer

Four classmates collect data by conducting a poll. They
ask students chosen at random how many days a week
they stay after school for clubs.
• Zach interviews 100 students.
• Alyssa interviews 65 students.
• Olivia interviews 75 students.
• Ryan interviews 45 students.
Whose results are probably the most trustworthy?
A. Ryan's
B. Olivia's
C. Zach's
D. Alyssa's

Answers

Answer:

C, he interviewed the most people.

Brainliest please!

Answer:

C. Zach's

Step-by-step explanation:

PLEASE ANSWER ASAP WILL MARK BRAINLIEST!!

Find the surface area of a rectangular prism that has the following dimensions.

length: 2 ft

width: 14 in.

height: 11

surface area= ____ in.^2

Answers

Answer:

408in.^2

Step-by-step explanation:

the formula is 2(wl×hl×hw)

Answer:

1508

Step-by-step explanation:

How does math anxiety affect working memory, and why do such changes in
working memory interfere with math performance?

Answers

Anxiety can cause you to overthink what you already know which interns makes you think you don’t know it. Math is just formulas and arthritic and if anxiety has you doubting that you know how to solve a problem then you won’t remember how to solve it

Please help it’s a test! Brainliest

Find the unit rate round to nearest hundredth if necessary!

No files please :)

Answers

Answer:

the correct answer is [tex] 4\frac{1}{2} [/tex]

if the area of a wall is 36 square meters, what is the perimeter?​

Answers

Answer:

18

Step-by-step explanation:

it is 18 because you would 36 divided by 4 to get 9. Then you would do 9 plus 6 to get the answer 18

What is mZN? N P (4x + 36) M (6x - 2)° Q

Answers

Answer:

Hello! answer: 68

Step-by-step explanation:

x = 19 19 × 4 = 76 76 + 36 = 112

19 × 6 = 114 114 - 2 = 112

112 + 112 = 224 360 - 224 = 136 136 ÷ 2 = 68 therefore the answer is 68

Yo bro you already know purrr purr purr

2 After a hailstorm, a large car dealership wants to determine the proportion of cars that have damage. The service department randomly selects 50 cars on the dealership lot, examines them, and finds that 11 cars have damage. They want to construct a 99% confidence interval for the true proportion of cars with damage from the storm. Are the conditions for inference met? O Yes, the conditions for inference are met No, the 10% condition is not met No, the randomness condition is not met No, the Large Counts Condition is not met. ​

Answers

Answer:

Yes, the conditions for inference are met

Step-by-step explanation:

Conditions for inference:

To build a confidence interval for a population proportion, the sample must have at least 10 successes and 10 failures.

In this question:

50 cars, 11 have damage and 50 - 11 = 39 do not.

Since both the number of sucesses and of failures is above 10, conditions for inference are met.

If all of the diagonals are drawn from a vertex of a quadrilateral, how many triangles are formed?
1
2
3
04

Answers

Answer:

4

Step-by-step explanation:

From the chioces give it would be 4

But it is actually 8

Please tell me if any are wrong. Thankyou. I will give brainliest

Answers

Answer:

Those are all correct!

Step-by-step explanation:

Great Work! Have a Nice Day!

Answer:

nope ur good

Step-by-step explanation:

but the 4th one is wrong

Wake up and help me out thank youuuuu !!!!

Answers

Correct answer is the last one
The answer is The fourth one D

Find the value of
x² when x=6
مز​

Answers

Answer:

Step-by-step explanation:

What the hell is that

Answer:

36 is equal to x² if x=6 however im not sure what that other symol is maybe an accident?

Step-by-step explanation:

Find the measure of angle w.'
5 points
wo
124°
О124
О 34
оооо
56

Answers

Answer:

56

Step-by-step explanation:

Angles w and 124 are linear pair angles,

w + 124 = 180

w = 180 - 124

w = 56

Find an
angle 0 coterminal to -1032°, where 0° Delta math

Answers

you will find the answer in tube

the answer in the tube

What’s the answer (no link I give brainly)

Answers

Answer:

C

Step-by-step explanation:

i got this correct on my test

Point P divides the directed segment from A to B in the ratio 9 to 2. The coordinates of point A are
(-4,-2) and the coordinates of point P are (2, 1). Find the coordinates of point B. Round your answer to
the nearest tenth if necessary.

Answers

Answer:

[tex]B =(3.3,1.7)[/tex]

Step-by-step explanation:

Given

[tex]A(x_1,y_1) = (-4,-2)[/tex]

[tex]P(x,y) = (2,1)[/tex]

[tex]m : n = 9 : 2[/tex]

Required

The coordinates of [tex]B(x_2,y_2)[/tex]

The line segment from ratio is calculated as:

[tex](x,y) = (\frac{mx_2 + nx_1}{m+n},\frac{my_2 + ny_1}{m+n})[/tex]

Substitute: A, P, m and n

[tex](2,1) = (\frac{9 * x_2 + 2*-4}{9+2},\frac{9*y_2 +2 *-2}{9+2})[/tex]

[tex](2,1) = (\frac{9x_2 -8}{11},\frac{9y_2 -4}{11})[/tex]

Multiply through by 11

[tex](22,11) = (9x_2 -8,9y_2 -4)[/tex]

By comparison:

[tex]9x_2 - 8 = 22[/tex]

[tex]9y_2 - 4 = 11[/tex]

So, we have:

[tex]9x_2 - 8 = 22[/tex]

[tex]9x_2 = 22 +8[/tex]

[tex]9x_2 = 30[/tex]

Solve for x2

[tex]x_2 = 30/9[/tex]

[tex]x_2 = 3.3[/tex]

[tex]9y_2 - 4 = 11[/tex]

[tex]9y_2 = 11+4[/tex]

[tex]9y_2 = 15[/tex]

Solve for y2

[tex]y_2 =15/9[/tex]

[tex]y_2 =1.7[/tex]

So, the coordinates of B is:

[tex]B =(3.3,1.7)[/tex]

Select the word from the following list that best describes each situation.

1. You deposit money in a savings account, and every year the amount of
money in the account increases by 2.5%.

2. For every car sold, a car salesman is paid 6% of the car's price.

3. Someone who eats at a restaurant pays an extra 20% of the food price. This
extra money is kept by the person who served the food.

4. An antique furniture store pays $200 for a chair, adds 50% of that amount,
and sells the chair for $300.

5. The normal price of a mattress is $600, but it is on sale for 10% off

6. For any item you purchase in Texas, you pay an additional 6.25% of the
item's price to the state government.

A Tax
B. Commission
C. Discount
D. Markup
E Tip or gratuity
F. Interest

Answers

Answer:

F

B

E

D

C

A

Step-by-step explanation:

Divide.
-2 5/12 divided by 1/3

Answers

Answer:

Step-by-step explanation:

-7.25

:D hope it helps

Hopes this helps:

Answer: -7 1/4

Please mark as brainlist
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