Quote:1. Find the distance along an arc on the surface of the earth that subtends a central angle of 7 minutes (1 minute = 1/60 degree). The radius of the earth is 3960 miles.

(7/360)*2*pie*3960 miles

Quote:2. Find the distance that the earth travels in one day in its path around the sun. Assume that a year has 365 days and that the path of the earth around the sun is a circle of radius 93 million miles.

2*pie*93000000/365 miles