Find the length of the curve.x = 7 sin t - 7t cos t, y = 7cos t + 7t sin t, 0 ? t ? 
A. 
?2
B. 
?2
C. 
?
D. 
?2
Answer: D
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Solve the problem.If f(x) = 2x + 9 and g(x) = -6x2 + 5x + 6, find g(f(9)).
A. 3 B. -21 C. -4233 D. -861
Graph the polar equation.r2 = 27 cos 4?
A. 
B. 
C. 
D. 
Identify the polynomial as a monomial, binomial, trinomial, or none of these.10y7 + 1
A. Trinomial B. None of these C. Monomial D. Binomial
First, use front-end rounding to round each number and estimate the answer. Then, find the exact answer.Mr. Buttimer took a plane trip for a total of 6.13 hours. He watched an in-flight movie for 1.54 hours. From the airport, he took a cab ride for 0.51 hour to the train station. Next, he took the train home for 2.27 hours. What was the total time spent traveling?
A. Estimate: 12 hours; exact: 10.45 hours B. Estimate: 11 hours; exact: 10.45 hours C. Estimate: 9 hours; exact: 8.91 hours D. Estimate: 11 hours; exact: 8.91 hours