Answer:
A(t) = -1.8t - 4.5
Step-by-step explanation:
Let the starting level of Mr. Mole is 'b'.
Since Mr. Mole is descending with respect to the ground, at the rate = 1.8 meters per minute
After time 't' altitude of Mr. Mole will be = b - 1.8t
If we represent the altitude of Mr. Mole with A(t).
Then the equation will be,
A(t) = b - 1.8t
Or, A(t) = -1.8t + b
At the time t = 5 minutes, his altitude was 13.5 meters.
So, -13.5 = -1.8×(5) + b
b = -13.5 + 9
b = -4.5
Now we substitute the value of b in the equation.
A(t) = -1.8t - 4.5
