An airplane is flying at a height of 3 kilometers on a path that will take it directly over the airport. At a certain instant its slant distance from the airport is 18 kilometers. How far must the plane travel to be directly above the airport? A 333km

B 315km

C 15km

D 21km

i think it is a but i don't know

Step-by-step explanation:

i hope it helps

sorry, i don't know i just need points, i'm new here. chao

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