Solve the problem.The intensity of a radio signal from the radio station varies inversely as the square of the distance from the station. Suppose the the intensity is 8000 units at a distance of 2 miles. What will the intensity be at a distance of 3 miles? Round your answer to the nearest unit.
A. 3520 units
B. 3539 units
C. 3556 units
D. 3582 units
Answer: C
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Solve the problem.A radio station claims that the amount of advertising per hour of broadcast time has an average of 15 minutes and a standard deviation equal to 1.6 minutes. You listen to the radio station for 1 hour, at a randomly selected time, and carefully observe that the amount of advertising time is equal to 8 minutes. Calculate the z-score for this amount of advertising time.
A. 4.38 B. 0.43 C. -11.2 D. -4.37
Test the equation for symmetry with respect to the specified axis, line, or pole.r = 2 sin(3?); the y-axis 
A. Symmetric about the y-axis B. May or may not be symmetric about the y-axis
Evaluate the integral.
A. 
+ C
B. 
+ C
C. 
+ C
D. 
+ C
Write the phrase as a variable expression. Use x to represent "a number."Twice a number, decreased by 14
A. x - 28 B. 2 + x - 14 C. 2(x - 14) D. 2x - 14