Question

The function h(t) = 210 – 15t models the altitude of a hot air balloon over time t, in minutes.

Answer 1

t represents time, which is the input of the function, so we know that 10 is the time in minutes. h(t) represents the altitude, which is the output of the function after time, t. So, we need to substitute 10 into 210 – 15t in place of t. Simplifying 210 – 15(10), we get that 60 is the altitude in feet. So, after 10 minutes, the hot air balloon is at 60 feet.

Answer 2

H(10) will tell u the altitude of the hot-air balloon in 10 minutes

h(10)....u r basically subbing in 10 for t
h(t) = 210 - 15t
h(10) = 210 - 15(10)
h(10) = 210 - 150
h(10) = 60 <==