Question

Cara ran 3 miles in 30 minutes. What is her constant rate of change in miles per hour?

Answer 1

curious if you got this one?

Which does NOT represent a constant rate of change of 70 miles per hour for a car?

Question 4 options:

The car travels 245 miles in 3.5 hours.

The car travels 140 miles in 2 hours.

d = 70t, where d represents distance in miles and t represents time in hours.

d = 70t, where d represents distance in kilometers and t represents time in hours.

Explanation:

Answer 2

6 mph

Explanation:

3 miles -----> takes 30 minutes

recall that 30 minutes = 1/2 an hour = 0.5 hours

hence,

3 miles -----> takes 30 minutes = 0.5 hrs

therefore her rate of change (i.e speed) in mph

= number of miles ran ÷ time taken in hours

= 3miles ÷ 0.5hrs

= 6 mph