Chapter 25:

7. Ibrahim has designed an experiment for the National Oceanic and Atmospheric

Administration to measure temperature and wind speed at different altitudes. His measure

instruments have been attached to a weather balloon that was launched in the middle of

the Atlantic Ocean. The Mechanism holding the instruments to the balloon was designed

to let the instrument loose when the height of the balloon is exactly 85,000 feet above sea

level. The function f(x)represents the height (in feet) of the instruments exactly xseconds

after the instruments were released.

Translate the following statements into English sentences or phrases describing the situation. If

possible, determine whether the statements are true, and explain how you know or why it's

impossible to know.

a. f(0) = 85,000

b. f(9) > f (13)

c. f(10) = 0