Solve the problem.The intensity I of light varies inversely as the square of the distance D from the source. If the intensity of illumination on a screen 5 feet from a light is 4 foot candles, find the intensity on a screen 20 feet from the light.
A. 
foot-candles
B. 1
foot-candles
C. 
foot-candles
D. 2 foot-candles
Answer: A
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Provide an appropriate response.Solve the following equation: 
= 
Fill in the blank(s) with the appropriate word(s).
Provide an appropriate response.A trailer rental company has rental and return facilities at both a north and south location in a city. Assume a trailer must be returned to one or the other of these locations. If a trailer is rented at the north location, the probability that it will be returned there is .6; if a trailer is rented at the south location, the probability it will be returned there is .65. Assume the company rents all of its trailers each day and each trailer is rented (and returned) only once a day. If the company starts with 50% of the trailers at each location, what is the expected distribution (in percentages) the next day?
A. 47.5% of the trailers at the north location; 52.5% of the trailers at the south location B. 37.5% of the trailers at the north location; 62.5% of the trailers at the south location C. 52.5% of the trailers at the north location; 47.5% of the trailers at the south location D. 62.5% of the trailers at the north location; 37.5% of the trailers at the south location
Give the value of the function in radians. Round to the nearest thousandth when necessary.cos-1 -0.9605
A. 1.289 B. 2.86 C. 1.853 D. 0.282
Find the center (h, k) and radius r of the circle. Graph the circle.x2 + y2 - 2x - 12y + 21 = 0 
A. (h, k) = (-1, 6); r = 4
B. (h, k) = (1, -6); r = 4
C. (h, k) = (1, 6); r = 4
D. (h, k) = (-1, -6); r = 4