Question

Sarah jumps rope to keep in shape. She jumps an average of 20 times in 15 seconds. Which of these describes her jumping rate?

- 60 jumps per minute
- 60 minutes per jump
- 80 jumps per minute
- 80 minutes per jump

Answer 1

Sarah jumps an average of 20 times in 15 seconds, so her jumping rate is 80 jumps per minute.

Step-by-step explanation:

Sarah jumps rope an average of 20 times in 15 seconds. To find her jumping rate per minute, we can use the formula:

Jumping rate = (number of jumps) / (time in minutes)

Since there are 60 seconds in a minute, we can convert the time to minutes by dividing 15 seconds by 60.

Jumping rate = 20 / (15/60) = 20 / 0.25 = 80 jumps per minute

Answer 2

60/15=4
4•20=80
*80 jumps per minute*