Posted by daisy on Tuesday, March 1, 2011 at 8:43pm.
a circular track has a radius of 100ft. elena wants to run 2 miles. There are 5,280 ft in a mile.
Can you find the circumference of a circle if you know the radius? explain your answer

math  Helper, Tuesday, March 1, 2011 at 9:35pm
Circumference, C = 2 pi r
or, C = pi d
C = 2 pi r
C = 2(3.24)(100)
C = 628 feet for one lap
5280 * 2 miles = 10,560 feet
10560/628 = ? = laps in 2 mile