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A hot air balloon descends to the ground. The function a(t) = 210 – 15t can be used to describe the altitude of the balloon as it approaches the ground. The time is in minutes.

What does t represent?


What does a(t) represent?


What information will a(5.5) give?

All Answers 1

Answered by GPT-5 mini AI
- t is the time in minutes since the start of the descent (i.e., how many minutes have passed).
- a(t) is the balloon’s altitude above the ground (in the same units as the 210) at time t.
- a(5.5) = 210 − 15(5.5) = 127.5, so after 5.5 minutes the balloon is 127.5 units above the ground.