The ratio of the number of tests Jed passed this year to the number of tests he failed is 13:3. What percent of all tests Jed took this year he failed?

18.75%

Step-by-step explanation:

Altogether he took 16 tests he failed 3 so we need to find 3 is what percent of 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

the anwser is d) 75°

step-by-step explanation: