The height h of a balloon, in feet, t seconds after it is released is given by the function
h
(
t
)
=
2
t
+
6
.




a. What is the value of h(20), and what does it mean in the context of the situation?



h(20) =
46

The height of the balloon
20
seconds after it is released is
46
feet.



b. Explain how to use the function to find the height of the balloon 2 minutes after it is released.



2 minutes is
60
seconds, so calculate the value of the function by substituting
t
=

60
in the equation.

The height of the balloon 2 minutes after it is released is
126
feet.



c. What is the height of the balloon just before it is released? How do you know?



feet

t =
before the balloon is released, and h(
) =