Question

It takes Dana 9 hours to make 12 costumes. Which proportion can be used to find h, the number of hours that it will take Dana to make 20 costumes at the same rates?

A. 9/12 = h/20

B. 9/h = 20/12

C. 9/20 = 12/h

D. 9/12 = 20/h
need this asap

Answer 1

A. 9/12 = h/20

Explanation:

we know that

It takes Dana 9 hours to make 12 costumes

so

using proportion

Find out the number of hours (h) that it will take Dana to make 20 costumes at the same rates

`(9)/(12)=(h)/(20)`

solve for h

Multiply in cross

`9(20)=12h\\h=15\ hours`