Solve the variation problem.The intensity of a radio signal from a radio station varies inversely as the square of the distance from the station. If the intensity is 8000 units at a distance of 2 miles, what will it be at a distance of 13 miles? Round to the nearest unit.
A. 215 units
B. 153 units
C. 189 units
D. 172 units
Answer: C
Mathematics
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Find the limit.
A. 
B. 0
C. 1
D. No limit
Mathematics
Set up the iterated integral for evaluating 
Dover the given region D.D is the right circular cylinder whose base is the circle 
in the xy-plane and whose top lies in the plane 
.
A. 
B. 
C. 
D. 
Mathematics
Solve the formula for the specified variable.7x + 10y = 19 for y
A. y = 
x + 
B. y = -
x + 
C. y = 7x - 19
D. - 7x - 10y = -19
Mathematics
Use the figure below to solve the right triangle if b= 9 and m?B = 16°. Round all answers to one decimal place.
 FIGURE.png)
Mathematics