What inverse trig function can be used to find the measure of angle A? a. sin -1
b. tan -1
c. cos -1
d. none

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6

4a. is 3 miles every hour

4b. is 1/3 of an hour per mile

step-by-step explanation: