Calculate the arc length of the indicated portion of the curve r(t).r(t) = (8cos3 9t)j + (8sin3 9t)k; 
? ? t ? 
?
A. 0
B. 4
C. 12
D. 24
Answer: C
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Find the indicated term of the sequence.an = (4n - 5)2; a9
A. 961 B. 1681 C. 1225 D. 729
Solve the problem.The winner of the 1998 Peoria 500 (mile) race was Serge Bologna, with an average rate of 175.786 mi per hr. What was his time (to the nearest thousandth of an hour)?
A. 0.786 hr B. 12.844 hr C. 2.844 hr D. 2.919 hr
Determine where the function is increasing and where it is decreasing.f(x) = x2 - 2x - 3
A. increasing on (-?, 1) decreasing on (1, ?) B. increasing on (-?, -4) decreasing on (-4, ?) C. increasing on (1, ?) decreasing on (-?, 1) D. increasing on (-4, ?) decreasing on (-?, -4)
The line graph shows the recorded hourly temperatures in degrees Fahrenheit at an airport. 
At what time was the temperature the highest?
A. 11 a.m. B. 5 p.m. C. 2 p.m. D. 1 p.m.