A red and a blue car leave Bellevue at the same time.

The red car drives north and the blue car drives west.

The red car is going 90 kilometers per hour and

the blue car is going 60 kilometers per hour.

The day is clear.



After 3 hours,

a) how far apart are the cars? kilometers

b) how fast is the distance between the cars changing? km/hr

(Enter each answer as decimal rounded to 2 places.)