Right triangle ABC has , , and

style="vertical-align: middle;" data-wiris-created="true" varid="variable_id_field" variablename="impvar_14455ebf5b3b4469b28aa8009" />. Use this information to find cos A.

?



A.
B. ?
C. ?
D. ?
E. ?

---

Answer: E

Mathematics

Solve the problem.Find the volume of the region bounded by the coordinate planes and the planes , .

A.
B.
C.
D. 9

Multiply and reduce answers to lowest terms. Write improper fractions as whole or mixed numbers. ? 

A.
B.
C.
D.

Write an algebraic equation and use it to solve the problem.During a road trip, Tonya drove one-third the distance that Lana drove. Mark drove 12 miles more than Lana. The total distance they drove on the trip was 530 miles. How many miles did each person drive?

A. Tonya drove 70 miles, Lana drove 210 miles, and Mark drove 222 miles. B. Tonya drove 222 miles, Lana drove 666 miles, and Mark drove 678 miles. C. Tonya drove 666 miles, Lana drove 222 miles, and Mark drove 210 miles. D. Tonya drove 74 miles, Lana drove 222 miles, and Mark drove 234 miles.

Solve the problem.A vertical right circular cylindrical tank measures 22 ft high and 10 ft in diameter. It is full of oil weighing   How long will it take a 1/2 hp pump, rated at  to pump the oil to the level of the top of the tank? Give your answer to the nearest minute.

A. 22 min B. 4147 min C. 138 min D. 69 min