Arally car race course covers 515.97 miles. the winning car completed the course in 6.5 hours. what was the average speed of the winning car?

   79.38 miles per hour

Step-by-step explanation:

Given : Distance covered by rally car race course = 515.97 miles

Time taken to complete the course by winning car = 6.5 hours

The average speed of the winning car = ( Distance covered by rally car race course) ÷  (Time taken to complete the course by winning car)

= (515.97)÷ (6.5) miles per hour

= 79.38 miles per hour

Hence, the average speed of the winning car =  79.38 miles per hour.

My teacher always told me: use the percent change formula!!!

Here it is: new value-old value/ old value * 100%

This strategy will ALWAYS work for percent increase AND decrease: let's try it on this problem!

56700-42000/42000 * 100%

14,700/42000 = 100(x)

100* 14700 = 1470000

1470000/42000= 35

35/100 = 35%

Therfore, our percent increase is 35%!