Solve the problem.The population of a small town is given by the table.
If the population is modeled by p(t) = at2 + b where t is in years and 
corresponds to the year 1960 and 
corresponds the year 1970, find a.
A. 9
B. 7
C. 14
D. 18
Answer: B
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Use the basic identities to simplify the expression.
A. csc ? + 5
B. csc ? - 6
C. 
D. csc ? + 6
Perform the indicated operations.22 - (-4)3
A. 68 B. 85 C. 16 D. -60
Solve the problem.Consider the quadratic model h(t) = -16t2 + 40t + 50 for the height (in feet), h, of an object t seconds after the object has been projected straight up into the air. Find the maximum height attained by the object. How much time does it take to fall back to the ground? Assume that it takes the same time for going up and coming down.
A. maximum height = 50 ft; time to reach ground = 1.25 seconds B. maximum height = 75 ft; time to reach ground = 1.25 seconds C. maximum height = 75 ft; time to reach ground = 2.5 seconds D. maximum height = 50 ft; time to reach ground = 2.5 seconds
Use multiplication to check the answer. If an answer is incorrect, find the correct answer.
A. Incorrect; should be 40,810 R5 B. Incorrect; should be 40,810 R6 C. Correct D. Incorrect; should be 40,811 R4