Determine the domain of the function.f(x) = 
A. {x? x ? -9}
B. {x? x ? 9, x ? -9}
C. {x? x is a real number}
D. {x? x ? 9}
Answer: A
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Evaluate the iterated integral.
A. 144 B. 72 C. 18 D. 36
Determine whether the number is divisible by 2, 3, 4, 5, 6, 7, 8, 9, and/or 10.24
A. 2, 3, 4, 6 B. 2, 3, 4, 6, 8 C. 2, 3, 4 D. 2, 3, 4, 8
Solve the problem.The number of hours of sunlight in a day can be modeled by a sinusoidal function. In the northern hemisphere, the longest day of the year occurs at the summer solstice and the shortest day occurs at the winter solstice. In 2000, these dates were June 22 (the 172nd day of the year) and December 21 (the 356th day of the year), respectively. A town experiences 11.29 hours of sunlight at the summer solstice and 7.94 hours of sunlight at the winter solstice. Find a sinusoidal function 
that fits the data, where x is the day of the year. (Note: There are 366 days in the year 2000.)
A. y = 11.29 sin 
+ 9.615
B. y = 1.675 sin 
+ 9.615
C. y = 1.675 sin 
+ 9.615
D. y = 11.29 sin 
+ 7.94
Use a table of integrals to solve the problem.There are currently 67 million cars in a certain country, increasing by 
annually. How many years will it take for this country to have 
cars? Round to the nearest year.
A. 5 years B. 17 years C. 206 years D. 1.4 years