Question

Tara's car accelerated from 10 miles per hour to 60 miles per hour in 12 seconds.

What is the approximate rate of change in the miles per hour that Tara's car accelerated?
A) 4 miles per hour per second
B) 5 miles per hour per second
C) 18 miles per hour per second
D) 48 miles per hour per second

Answer 1

The difference in speed is 50 miles per hour
If the rate is constant, we should duvide this change into 12 intervals (or seconds)
40/12 = 4 (approximately)
So, the answer would be A

Answer 2

Tara's car accelerated from 10 miles per hour to 60 miles per hour in 12 seconds.First let's solve for the unit rate of Tara's acceleration:=> 10 miles per hour=> 60 miles per 12 seconds=> 60 / 12=> 5 miles per secondsWhat is the approximate rate of change in the miles per hour that Tara's car accelerated?Thus the answer to this question is letter B. 5 miles per second.