The simple formula for the nth term of an arithmetic sequence is an = 4n + 16. what is the explicit formula corresponding to the simple formula?

a. an = 16 + (n - 1)(4)
b. an = 20 + (n - 1)(4)
c. an = 16 + 4n
d. an = 20 + (n)(4)
e. an = 4 + (n - 1)(16)

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