If no digit can be used more than once in a number, how many 2-digit numbers can be formed using only the digits 7, 1, 3, and 9? Answer options with 5 options A. 2 B. 6 C. 8 D. 10 E. 12

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step-by-step explanation:

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