Solve the problem.If a rock falls from a height of 80 meters above the ground, the height H (in meters) after t seconds is approximately 
where 
What is the height of the rock after 2 seconds? Round your answer to the nearest tenth.
A. 60.4 meters
B. -16.04 meters
C. 300.4 meters
D. 70.2 meters
Answer: A
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Answer the question.Suppose that a test for a disease correctly gives positive results for 95% of those having the disease and correctly gives negative results for 90% of those who don't have the disease. Suppose also that the incidence of the disease is 1%. If a person tests positive for the disease, what is the chance that they have the disease? Find the exact percentage.
A. 8.8% B. 13.4% C. 95% D. 10%
Use cylindrical coordinates to find the volume of the indicated region.the region bounded below by the xy-plane, laterally by the cylinder 
and above by the plane 
A. 7? B. 196? C. 49? D. 28?
Write the converse of the statement.q ? (p ? r)
A. ~q ? ~(p ? r) B. ~q ? (p ? r) C. (p ? r) ? ~q D. (p ? r) ? q
Solve.log9 (x - 5) + log9 (x - 5) = 1
A. 8
B. 
C. -8, 8
D. -
, 