Solve the problem.Rewrite the following in the form of a single exponential: x5 ? y5
A. Cannot be simplified
B. (xy)6
C. (xy)5
D. (xy)10
Answer: C
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An automobile is worth $27,210 in 2010. Each year after 2010 the value decreases by $1,887. ? A: Find a formula that gives the value V, in dollars, t years after 2010. ? B: When will the value of the car be $10,227?
What will be an ideal response?
Solve the problem.Suppose there are two low-frequency sound waves with similar frequencies. Let 
and 
model the two tones where t is time measured in seconds. Write the sum 
as a product of two trigonometric functions, and determine the frequency of the beats.
A. no beats 0.008 cos (94?t) cos (94?t) B. 4 beats per second 0.008 cos (94?t) cos (4?t) C. no beats 0.008 cos (47?t) cos (47?t) D. 2 beats per second 0.008 cos (47?t) cos(2?t)
Solve the equation.x + 
= 
A. 
B. 
C. 1
D. 
Use a graphing utility to graph the function over the indicated interval and approximate any local maxima and local minima. If necessary, round answers to two decimal places.f(x) = x3 - 3x2 + 1; (-5, 5)
A. local minimum at (0, 1) local maximum at (2, -3) B. local minimum at (2, -3) C. local maximum at (0, 1) local minimum at (2, -3) D. none