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Elenna [48]
2 years ago
6

A class of 28 students has 13 boys and 15 girls. what is the ratio of boys to girls in the class?

Mathematics
1 answer:
IgorC [24]2 years ago
3 0
28-13=15 so it would be 2
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Find the volume and surface area of a sphere with radius 1 yards. Round your answer to two decimal places.
olga55 [171]

Answer:

Volume of the sphere up to two decimal places= 4.19 cubic yards

Surface area of the sphere up to two decimal places  =12.56 square yards

Step-by-step explanation:

Given:

The radius of the sphere= 1 yard

Volume of a Sphere:

                        \frac{4}{3}* \pi *r^3                                                         :\pi =\frac{22}{7} =3.14

               =\frac{4}{3}*3.14*1*1*1

               =4.187 cubic yards

Volume of the sphere up to two decimal places= 4.19 cubic yards

Surface area of the sphere= 4*\pi* r^2

                                           =4*3.14*1*1

Surface area of the sphere up to two decimal places  =12.56 square yards

8 0
3 years ago
The sides of two cubes are in the ratio 2:1. What is the ratio of their volumes ?
olasank [31]

Please mark as brainliest

Answer:

we know that, Volume of cube=a³

Let volume of 1st cube be 2x with side a and other be x with side A (according to given ratio)

Step-by-step explanation:

ATQ: 2x=a³ and, x=A³

a=³√2x and, A=x

we know that, surface area of cube is 6a²

Thus, surface area of 1st cube = 6(³√2x)²

= 6³√4x²

Surface area of 2nd cube=6(x)²=6x²

Ratio of S.A=(6³√4x²)÷(6x²)

Ratio of S.A=³√4:1

<em><u>Please mark as brainliest</u></em>

Have a great day, be safe and healthy

Thank u  

XD

5 0
3 years ago
Harmony used discarded paper to make notepads for her friends. She would fold five letter size pieces of paper three times then
Anna11 [10]
First fold of a piece of paper produces two smaller pieces of paper
Second fold of the resulting pieces of paper produces 4 smaller pieces of paper.
Third fold of the resulting pieces of paper produces 8 smaller pieces of paper.

Thus, the five letter size pieces of paper folded three times produces 8 x 5 = 40 notes.

Thus, one notepad consists of 40 notes.

If someone wrote ten notes per day, then one notepad will last for 4 days.
7 0
3 years ago
Read 2 more answers
If i can get 2 Amy's organic soup for $4 how much would it be for 1 Amy's organic soup?
Rudiy27

Answer: $2

Step-by-step explanation:

just do 4 divided by 2 and your answer is 2

4 0
3 years ago
Read 2 more answers
Hello, could someone please help me find three pairs for this question
amid [387]

Answer:

x - y = -3        x + y = 9

x      y            x     y

-2 , 1              -2 , 11

-1 , 2              -1 , 10

0 , 3               0 , 9

1 , 4                1 , 8

2 , 5                2 , 7

Hope this helps.

7 0
2 years ago
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