Question

You run around the perimeter of a baseball field at a rate of at least 10 feet per second. Which of the following are possible amounts of time that it takes you to run around the baseball field? The top of the semicircle is 40% of a circle of radius 175 ft. And the bottom two sides... I think... are 250 ft.

Answer 1

79 seconds

Explanation:

Answer 2

1) we have to calculate the lenght of the baseball field.

perimeter of the baseball field=2(radius)+lenght of a semicircle.

2(radius)=2(175 ft)=350 ft
lenght of a semicircle=40% of a circumference=(40/100)(2πr)

Perimeter of the baseball field=2(175 ft) + (40/100)(2π175 ft)=
=350 ft + 140π ft=350 ft + 439.82 ft=789.82 ft,


2)Now, we calculate the amounts of time that it takes you to ruan arount the baseball field.

10 ft------------------------1 second
789,82 ft----------------- x

x=(789.82 ft * 1 second) / 10 ft=78.98 s≈79 s


answer: 79 seconds.