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

Mathematics

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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

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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

Mathematics

Evaluate the integral.

A.  + C
B.  + C
C.  + C
D.  + C

Mathematics

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

Mathematics