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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Graph the hyperbola. Give the coordinates of the center as well as the values of a and b.y2 - 9x2 = 81
A. center (0, 0), a = 9, b = 3
B. center (0, 0), a = 9, b = 3
C. center (0, 0), a = 3, b = 9
D. center (0, 0), a = 3, b = 9
Solve the problem.The number of new products containing a new carbohydrate supplement are shown in the table for various years.
Let n be the number of new products containing the carbohydrate supplement in the year that is t years since 2001.a. Create a scattergram of the data.b. Did the number of new products that contain the carbohydrate supplement increase, decrease, stay approximately constant, or none of these?c. Did the annual increase in the number of new products that contain the supplement increase, decrease, stay approximately
constant, or none of these? What will be an ideal response?
Graph the equation.y - 5 = 0
A. 
B. 
C. 
D. 
Use a proportion to solve the problem.If 8 sandwich rolls cost $1.76, how much will 26 rolls cost?
A. $6.72 B. $16.08 C. $5.72 D. $14.08