Answer !

john's car is stopped at a red light. when the light changes, the car accelerates to 45 miles per hour in 15 seconds.
what is the approximate rate of change in the miles per hour that john's car accelerated?
a)
3 miles per hour per second
b)
12 miles per hour per second
c)
15 miles per hour per second
d)
30 miles per hour per second

A) 3 miles per hour per second

Step-by-step explanation:

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles

6 spoons of sugar for every 21 cups of flour

step-by-step explanation: