Hi there! The answer is h(10) = 60. h(10) means the height of the hot air balloon after 10 minutes.
We have the following function
[tex]h(t) = 210 - 15t[/tex]
Filling in t = 10 gives
[tex]h(10) = 210 - 15 \times 10 = 210 - 150 = 60[/tex]
Therefore, the height (h) of the hot air balloon after ten minutes (t = 10) is 60.
