Solve the problem.The total solar radiation H (in W/m2) on a particular surface during an average clear day in one U.S. city is given by 
where t is the number of hours from noon. Find a general expression which can be used to determine how fast the rate of change of solar radiation on the surface is changing at any given time (ie find d2H/dt2).
A. 
B. 
C. 
D. 
Answer: A
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Perform the indicated operation.(-72) ÷ (3 - 3)
A. 0 B. -72 C. Undefined D. -12
An object moves in simple harmonic motion described by the given equation, where t is measured in seconds and d in meters . Find the maximum displacement, the frequency, and the time required for one cycle.d = 2 cos 5?t meters
A. displacement = -2 meters; period = 
seconds; f = 
oscillations/second
B. displacement = 2 meters; period = 
? seconds; f = 
oscillations/second
C. displacement = 2 meters; period = 
seconds; f = 
oscillations/second
D. displacement = 2 meters; period = 
seconds; f = 
oscillations/second
Perform the indicated operation and express in lowest terms.
- 
A. 
B. 
C. 
D. 
Match the rational function with the appropriate graph.f(x) = 
A. 
B. 
C. 
D. 