Solve the problem.The average daily temperature T of a city in the United States is approximated by T = 55 - 23 cos 
(t -30)where t is in days, 1 ? t ? 365, and t = 1 corresponds to January 1. Find the period of T.
Fill in the blank(s) with the appropriate word(s).
365 days
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Decide which of the two given prices is the better deal.You can buy hair product in a 12-ounce bottle for $4.56 or in a 8-ounce bottle for $2.88.
A. not enough information B. 8-ounce bottle for $2.88 C. equal value D. 12-ounce bottle for $4.56
Find an equation of variation in which y varies inversely as x and the following is true.y = 34, when x = 22
A. y = 
B. y = 
C. y = 1.55x
D. y = 748x
Use an identity to write the expression as a single trigonometric function or as a single number. cos2
- sin2
A. 
B. 
C. - 
D. - 
Solve the problem using your calculator.The paired data below consist of the temperatures on randomly chosen days and the amount a certain kind of plant grew (in millimeters). Use a graphing calculator to model the data with a linear function that predicts a plant's growth as a function of temperature.
A. y = 7.30 + 0.122x B. y = 14.6 + 0.211x C. y = 7.30 - 0.112x D. y = -14.6 - 0.211x