Use a product-to-sum identity to rewrite the expression.sin 5t sin 2t
A. 0.5(sin 7t + sin 3t)
B. 0.5(cos 7t + cos 3t)
C. 0.5(cos 3t - cos 7t)
D. 0.5(sin 7t - sin 3t)
Answer: C
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Find the product. Simplify before performing the multiplication.
? 0 ? 
A. 0
B. 
C. undefined
D. 
Find the area A. Round the answer to three decimal places.
A. 10.996 cm2 B. 21.991 cm2 C. 1.833 cm2 D. 3.5 cm2
Use the Principle of Mathematical Induction to show that the statement is true for all natural numbers n.
n = 82n
What will be an ideal response?
Solve the problem.A cellular phone company determines a monthly bill from the x number of minutes of usage. The amount of the bill, B(x), (in dollars) is given by the function: 
How many minutes did Marv use his phone during the month of July if his bill was $36.63?
A. 34 minutes B. 7 minutes C. 67 minutes D. 336 minutes