4. Consider the temperature in a classroom throughout any given day. Suppose that the
temperature constantly cycles between 68°F and 80°F and is given by the sinusoidal function
f(0) = Acos(Bt) + C, where t=the number of hours after midnight. The temperature starts at
68°F at midnight and first returns to 68°F at 8am.
a) Sketch the graph of the function for two full periods.

Desmond wants to sell his car that he paid $8,000 for 2 years ago. the car depreciated, or decreased in value, at a constant rate each month over a 2-year period. if x represents the monthly depreciation amount, which expression shows how much desmond can sell his car for today? 8,000 + 24x 8,000 - 24x 8,000 + 2x 8,000 - 2xdesmond wants to sell his car that he paid $8,000 for 2 years ago. the car depreciated, or decreased in value, at a constant rate each month over a 2-year period. if x represents the monthly depreciation amount, which expression shows how much desmond can sell his car for today? 8,000 + 24x 8,000 - 24x 8,000 + 2x 8,000 - 2x