Solve the problem.If a rock falls from a height of 90 meters on Earth, the height H (in meters) after x seconds is approximately H(x) = 90 - 4.9x2.When does the rock strike the ground? Round to the nearest hundredth, if necessary.
A. 3.75 sec
B. 18.37 sec
C. 4.29 sec
D. 1.94 sec
Answer: C
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Simplify the expression.
A. 
B. 
C. 
D. 
E. 
Use the Lucas sequence to answer the question.What is the 20th term of the Lucas sequence?
A. 15,217 B. 15,127 C. 9,349 D. 24,476
Provide an appropriate response.Is -4, -8, -12, -16, . . . an arithmetic sequence?
A. Yes B. No
Solve the problem.A rare baseball card was sold in 1990 for $215,000. The card was then resold in 1998 for $491,000. Assume that the card's value increases exponentially, and find an exponential function V(t) that fits the data. (Round decimals to three places.)
A. V(t) = 215,000e0.775t, where t is the number of years after 1990. B. V(t) = 215e0.775t, where t is the number of years after 1990. C. V(t) = 215,000e0.103t, where t is the number of years after 1990. D. V(t) = 215e0.103t, where t is the number of years after 1990.