Question

You ride your bike to school. As you approach an intersection, you decrease your speed by 1.5 miles per hour per second. Select an inequality that represents the time t (in seconds) until your speed decreases by more than 10.5 miles per hour. Then solve the inequality.

Answer 1

Answer: Loading...

Explanation: Loading...

Answer 2

Answer: The acceleration is equal to the change in velocity per time. Now, the acceleration is said to be 1.5 miles/h·s. We are asked to find the corresponding time when the change in velocity is 10.5 miles/h such that the acceleration does not change.

a = Δv/t

1.5 = 10.5/t

t = 7 seconds