What is the ratio of 3:8 and 4:10

 Option C - 7 to 22.96  

Step-by-step explanation:

Given :  Sierra found that 15 meters is equivalent to 49.2 feet.

To find : Which of the following is an equivalent ratio?

Solution :

Sierra found that 15 meters is equivalent to 49.2 feet.

So, The ratio of the given situation is

Now, We check one by one

A) 3 to 8.84

B) 5 to 18.22

C) 7 to 22.96

D) 9 to 25.32

Therefore, The correct option which is equivalent is Option C.

So, An equivalent ratio is 7 to 22.96.