Charlie ran 5 miles in 51.5 minutes. use the equation 5r=51.5 to find r, the average rate he ran.

answer: a.   one is a factor of every whole number since every number is divisible by itself.

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2