Solve the problem.At what times in the interval 0 ? t ? ? are the velocity and the acceleration vectors of the motion 
orthogonal?
A. t = 
B. t = 0; t = 
; t = ?
C. Velocity and acceleration vectors are orthogonal for all t in 0 ? t ? ?.
D. t = 0
Answer: B
Mathematics
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Subtract.12 - (-1)
A. -11 B. 13 C. 11 D. -13
Mathematics
Solve.A guy wire to a tower makes a 73° angle with level ground. At a point 40 ft farther from the tower than the wire but on the same side as the base of the wire, the angle of elevation to the top of the tower is 
Find the length of the wire to the nearest foot.
A. 90 ft B. 95 ft C. 50 ft D. 45 ft
Mathematics
Add or subtract as indicated. Express the answer in feet and inches.11 ft 4 in. - 3 ft 2 in.
A. 14 ft 2 in. B. 8 ft 2 in. C. 7 ft 2 in. D. 8 ft 4 in.
Mathematics
Convert the area as indicated.0.098 square meters to square centimeters
A. 98 cm2 B. 9.8 cm2 C. 9800 cm2 D. 980 cm2
Mathematics