HELPPP!! The head of a carriage bolt is circular, as shown. The head of this bolt has a diameter of 20 millimeters.
Which measurement is closest to the area of the head of this bolt in square millimeters?

A. 1,256 square millimeters
B. 63 square millimeters
C. 314 square millimeters
D. 31 square millimeters

You have a 32-foot fence around a square garden. there are 4 equal sections. you paint 13 of one section of the fence. what fraction of the fence did you paint? you have a 32-foot fence around a square garden. there are 4 equal sections. you paint 13 of one section of the fence. what fraction of the fence did you paint?

Suppose a pendulum is l meters long. the time,t,in seconds that it tales to swing back and forth once is given by t=2.01

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?