if there are 65 boys in a classroom and the ratio of boys to girls is 13:15, how many students are in the class?

Answers

Answer 1

Answer: There are 65 boys, and the boy ratio is 13: so to find how they got that, divide 65 by 13 and that is 5. Since we now know it is the amount of people, divided by 5, we can take the girl ratio (15) and multiply it by 5 to get the amount of girls (which is 75). You need to find the total amount of students in the class so add the boys and girls (65+75) and get 140 total students

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A box of cereal has a width of 4 inches, and a length of 8 inches and a height of 12 inches. What is the volume of the box, in cubic inches? Use the formula , where V represents the volume, l represents the length, w represents the width, and h represents the height.

Answers

Hey there,

Formula: V = lwh

Plug in and solve:

V = (8)(4)(12)

V = 384 inches

Hope I helped!

-Char

Answer:

$\text{Volume of box of cereal}=384\text{ in}^3$

Step-by-step explanation:

We have been given that a box of cereal has a width of 4 inches, and a length of 8 inches and a height of 12 inches.

To find the volume of our give box we will use volume of cuboid formula.

$\text{Volume of cuboid}=l*w*h$ , where,

$l=\text{Length of cuboid}$ ,

$w=\text{Width of cuboid}$ ,

$h=\text{Height of cuboid}$ .

Upon substituting our given values in volume formula we will get,

$\text{Volume of box of cereal}=\text{8 in*4 in*12 in}$

$\text{Volume of box of cereal}=384\text{ in}^3$

Therefore, the volume of box of cereal is 384 cubic inches.

Eighteen is 60% of what number

Answers

the answer is 30 to 18 is 60%

18 is 60% of 30

60% of x=18
60% *x=18
60/100 *x=18
60x=18*100
x=18*100/60
x=30

Hope that helps you! :)

A circle with a radius of 4 in, is dilated by a scale factor of 5. What will be the circumference of the circle after dilation?21 in
4 in
161 in
24 in

Answers

Ok so circumference=2*pi*radius. So We know that the radius is dilated by a scale factor of 5, so we can put 2*pi*20. For pi you can use So when we multiply 2*pi*20, you get 125.6637

in the central city grand prix out of 30 cars that started the race,12 of them finished. what percent of the cars finished the race? what percent did not finished the race?

Answers

To get the answer we can use proportion.
30 ------------- 100%
12 --------------x
crossmultiply now
30x=12*100%
30x=1200% /:30 (divide both sides by 30)
x=40% - its the percentage of cars which finished the race.
100%-40%=60% - its the answer

Subtract 12 from 30 so that you know how many DID NOT finish. 30-12=18.
12/30 finished. Divide 12 by 30. 12÷30=0.4, and multiply by 100%. 0.4x100=40, so
40% finished.

18/30 did not finish. Divide 18 by 30. 18÷30=0.6, and multiply by 100%. 0.6x100=60, so
60% did not finish.

Is 0.02468 greater than 0.024

Answers

use zeroes as place holders
0.02468
0.02400
so clearly 0.02468 is greater than 0.02400
so yes, 0.02468 is greater than 0.024
but remember don't use those extra zeroes in ur actual answer.

What is the equivalent fraction of 24/126

Answers

Answer:4/21

Step-by-step explanation:divide 6 by both sides

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