Question

Tim filled his beach ball with 800 cubic inches of air. It loses 30% of its remaining air every 15 days. Which expression models how much air will be left after 5 months? (Let 15 days = twice a month.)

Answer 1

22.6in³

Explanation:

a = 800(0.7)^(150/15)

a = 800(0.7)^(10)

a = 22.6in³

Answer 2

800(1-0.3)^5*2

Explanation:

bright thinker confirmed