Solve the problem.A ball is thrown upward with an initial velocity of 42 meters per second from a cliff that is 
high. The height of the ball is given by the quadratic equation 
where h is in meters and t is the time in seconds since the ball was thrown. Find the time that the ball will be 30 meters from the ground. Round your answer to the nearest tenth of a second.
A. 9.4 sec
B. 9.5 sec
C. 10.1 sec
D. 10.0 sec
Answer: A
Mathematics
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Express the number in scientific notation.870,000
A. 8.7 × 105 B. 8.7 × 104 C. 8.7 × 10-4 D. 8.7 × 10-5
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Expand the number to its natural form.4.07 × 10-4
A. 0.0000407 B. 0.00407 C. 0.0407 D. 0.000407
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Solve the equation. Round to the nearest thousandth.4e(3x + 2) = 2
A. {-2.088} B. {0.292} C. {-1.626} D. {-0.898}
Mathematics
Use a graph to solve the inequality.(x2 + 3x)1/4 > 41/4
A. (-?, -4) ? (1, ?) B. (-1, 4) C. (-?, -1) ? (4, ?) D. (-4, 1)
Mathematics