Respuesta :

The answer is 200 !
Explanation - if she jumped 5 times in 12 minutes,there are 60 minutes in a hr ! So 60 divided by 12 is 5 ! So next multiply 5 times 5 to get 25 . So meaning she jumped 25 times in a hr ! Then multiply 25 times 8 to get 200

Answer:

200

Step-by-step explanation:

Change 8 hours to minutes so the units are the same.  8(60) = 480.  Using a proportion the equation is 5/12 = j/480.  [jumps/minutes]  To solve the equation, cross multiply:  12j = 5(480) ; 12j = 2400;  j = 2400/12;  j = 200.