Acar is traveling at a speed of
90
kilometers per hour. what is the car's speed in kilometers per minute? how many kilometers will the car travel in
15
minutes? do not round your answers.

The car is travelling at 90 kilometers per hour (90 kmph)

What is the car's speed in kilometers per minute?)
We know 1 hour = 60 minutes,
90 km / 60 minutes = 1.5 kilometers per minute 
The speed of the car is 1.5 kilometers per minute

How many kilometers will the car travel in 15 minutes?)
We know that the car travels 1.5 kilometers in 1 minute. So in 15 minutes:
1.5 kilometers * 15 minutes = 22.5 kilometers

The car will travel 22.5 kilometers in 15 minutes.