Solve the problem.If a rock falls from a height of 20 meters on Earth, the height H (in meters) after x seconds is approximately H(x) = 20 - 4.9x2.When does the rock strike the ground? Round to the nearest hundredth, if necessary.
A. 2.02 sec
B. 4.08 sec
C. 0.83 sec
D. 0.91 sec
Answer: A
Mathematics
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Evaluate the expression using logarithms. Round to the nearest tenth.
A. 5512.7 B. 1.0 C. 10.6 D. 32.2
Mathematics
Solve the problem.In the following formula, f(x) is the minimum number of hours of studying required to attain a test score of x: 
How many hours of study are needed to score 96?
A. 21.45 hr B. 99.96 hr C. 11.09 hr D. 110.90 hr
Mathematics
Write a linear function f that has the indicated values.f(-2) = -4, f(0) = 3
A. f(x) = 
x + 3
B. f(x) = - 
x + 3
C. f(x) = - 
x + 3
D. f(x) = 
x + 3
Mathematics
Determine whether or not the function is one-to-one.f(x) = 4x - 1
A. No B. Yes
Mathematics