Outside temperature over a day can be modelled as a sinusoidal function. Suppose you know the high temperature for the day is 85 degrees and the low temperature of 45 degrees occurs at 5 AM. Assuming it is the number of hours since midnight, find an equation for the temperature, D, in terms of t.

Carla is saving money for a trip this summer. she already has some money in her savings account and will add the same amount to her account each week. at the end of 2? weeks, carla has? $130. at the end of 8? weeks, she has? $280. write a linear function in the form y=mx+b to represent the amount of money m that carla has saved after w weeks.