Use the circle graph to solve the problem.In a school survey, students showed these preferences for instructional materials.
About how many students would you expect to prefer lectures in a school of 750 students?
A. About 135 students
B. About 150 students
C. About 270 students
D. About 18 students
Answer: A
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Solve.Beaufort Canal has a semi-elliptical cross section with a width W = 55 feet and a depth D = 13 feet (see figure). The keel on Sasha's yacht rides 5 feet below the water line at the keel's deepest point. If the yacht travels parallel to the canal, and assuming the canal is completely full of water, how close can Sasha bring the yacht's centerline to the edge of the canal without running aground? (The keel is the very bottom of a boat hull and runs directly below the boat's centerline from front to back.)
A. 5 ft B. 4 ft C. 2 ft D. 25 ft
Solve the problem.Find equations of all tangents to the curve f(x) = 
that have slope -1.
A. y = x - 2 B. y = x + 2, y = x - 2 C. y = -x + 2, y = -x - 2 D. y = -x + 2
Determine if the given polar coordinates represent the same point.(5, ?/3), (-5, -2?/3)
A. Yes B. No
Solve the inequality. Express your answer using interval notation.
> 9
A. (-?, - 
) or (2, ?)
B. (-?, - 
) or (
, ?)
C. (- 
, ?) or (2, ?)
D. (- 
, 2)