Suppose the temperature of a cup of tea in degrees Fahrenheit [math] minutes after it has been poured may be modeled by the equation [math].

a) What is the temperature of the tea after 3 hours?
degrees Fahrenheit

b) How long does it take for the cup of tea to cool to 100 degrees?
minutes

c) What does each part of this equation mean?

[math]

A:

B:

C:

Hint:

Solution: