5). (2 points)
Find the area of this quarter-circle (1/4 of a circle):



Area: __________

6). (2 points)
Find the area of this figure (upper part is a half-circle):



Area: __________

7). (3 points) A car has wheels with a radius of 1 foot. How many revolutions does each of these car wheels make in 1 mile? (1 mile = 5280 feet)

Answer: __________