Write a formula for the nth term of the arithmetic sequence. Use the formula to find the 20th term of the sequence.2, 8, 14, 20, 26, . . .
A. an = 4n - 2; a20 = 78
B. an = 6n - 2; a20 = 118
C. an = 4n - 6; a20 = 74
D. an = 6n - 4; a20 = 116
Answer: D
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Calculate the arc length of the indicated portion of the curve r(t).r(t) = 3ti + 
j + 
k; -5? t ? -1
A. 100 B. -150 C. 20 D. -30
Evaluate. 53
A. 64 B. 15 C. 243 D. 125
Solve.In 1998, the population of Country C was 36 million, and the exponential growth rate was 1% per year. Find the exponential growth function.
A. P(t) = 36e1t, where P(t) is in millions and t is the number of years after 1998. B. P(t) = 36e0.01, where P(t) is in millions and t is the number of years after 1998. C. P(t) = 36e0.01t, where P(t) is in millions and t is the number of years after 1998. D. P(t) = 360.01t , where P(t) is in millions and t is the number of years after 1998.
Divide and simplify. Assume variables do not cause any denominators to equal 0.
÷ 
A. 
B. 
C. 
D. 