2 years ago

How do you change a number ti a percentage?

1 answer:

5 0

My teacher taught me to make an imaginary decimal and 0 at the beginning of the number and then move the decimal to the end of the number... idk that may be the wrong way to do it but you can try :/

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Ralph is 3 times as old as Sara. In 4 years, Ralph will be only twice as old as Sara will be then. Find Ralph's age now.

marshall27 [118]

3x-x=(2x+4)-(x+4)? That is my answer but it might not be right

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2 years ago

Joan has 5//13 of a book left to read for school.Joan read 2/13 of a book on Saturday .How many books does Joan have to read

kati45 [8]

Well you would first add 5/13 and 2/13, so 7/13. Then you would subtract 7 from 13. So your answer would be 6/13. Hope that helped!

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2 years ago

What is the diameter of a hemisphere with a volume of 2233\text{ cm}^3,2233 cm 3 , to the nearest tenth of a centimeter?

Agata [3.3K]

Answer:

The diameter of the hemisphere is 20.4 centimeters.

Step-by-step explanation:

The volume of an hemisphere is given by:

$V = \frac{2 \pi r^{3}}{3}$

In this problem, we have that:

$V = 2233$

$\frac{2 \pi r^{3}}{3} = 2233$

$2\pi r^{3} = 3*2233$

$r^{3} = \frac{3*2233}{2\pi}$

$r = \sqrt[3]{\frac{3*2233}{2\pi}}$

$r = 10.2$

The radius is 10.2 centimeters.

The diameter is double the radius. So:

2*10.2 = 20.4

The diameter of the hemisphere is 20.4 centimeters.

5 0

3 years ago

A convex polyhedron has faces that consist of 30 squares, 20 triangles, and 12 pentagons. The polyhedron has 120 edges. How many

VLD [36.1K]

D)))))) which is 180

5 0

2 years ago

Read 2 more answers

A − 7 = 3 (b+2) pls answer soon

Alexeev081 [22]

I believe the answer is....

For solving for a

a-7= 3(b+2) ———> distribute 3(b+2)
a-7= 3b+6 ———-> add 7 on both sides

a-7= 3b+6
a+7= 3b +7 ———-> the 7’s cancel out so you’re left with....

a = 3b + 13 (That’s your answer)

Hope that helped :3

8 0

2 years ago