Find the reciprocal.-19
A. 
B. 
C. 19
D. The number -19 has no reciprocal.
Answer: B
Mathematics
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Solve the problem.Find the distance from the point 
to the plane 
A. 
B. 
C. 
D. 
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Solve the problem.A right circular cylinder is obtained by revolving the region enclosed by the line x = r, the x-axis, and the line y = h, about the y-axis. Find the volume of the cylinder.
A. ?rh2 B. 2?r2h C. ?rh D. ?r2h
Mathematics
The abbreviation "a.c." means
A. as needed B. both ears C. before meals D. inside the cheek
Mathematics
Write the given number in scientific notation.721
A. 7.21 × 103 B. 7.21 × 101 C. 7.21 × 10-2 D. 7.21 × 102
Mathematics