27. A hot-air balloon 70 meters above the ground is falling at a constant rate of 6 meters per second while another hot-air balloon 10 meters above the ground is rising at a constant rate of 15 meters per second. To the nearest tenth of a second, after how many seconds will the 2 balloons be the same height above the ground?

Answer and Explanation

Your Answer is

Correct Answer is C

Explanation

Assuming x is the number of seconds needed to meet, then there is an equation 70 - 6x = 10 + 15x

x = 60÷21 ≈ 2.9, option C is in line