Graph the function.y = 3 sec 
A. 
B. 
C. 
D. 
Answer: C
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Verify that the given equation is an identity.cosh2x = 
What will be an ideal response?
Solve the variation 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 3 foot candles, find the intensity on a screen 20 ft from the light.
A. 
foot-candles
B. 
foot-candles
C. 1
foot-candles
D. 2 foot-candles
Determine whether the given statement is true or false.Some rational numbers are integers.
A. True B. False
Determine the intervals on which the function is increasing, decreasing, and constant.
A. Increasing on (?, 0); Decreasing on (0, -?) B. Increasing on (-?, 0); Decreasing on (-?, 0) C. Increasing on (0, ?); Decreasing on (-?, 0) D. Increasing on (-?, 0); Decreasing on (0, ?)