Question

Zoe and her dad go on a hot air balloon ride over the weekend. In order to remain safe, they cannot exceed an elevation of 450 feet. If they start at an elevation of 120 feet, and rise at a rate of 15 feet per minute, how many minutes can they continue to rise?

Answer 1

120 + 15m greater than or equal to 450

solution = 15 m greater than or equal to 330

Answer 2

450 - 120 = 330

330/15= 22

22 minutes