Solve the problem.A ball is thrown upward with an initial velocity of 28 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 it takes the ball to hit the ground. Approximate the answer to one decimal place.
A. 7.4 sec
B. 7.0 sec
C. 7.8 sec
D. 11.4 sec
Answer: A
Mathematics
You might also like to view...
Find the domain of the expression.
?
?
A. all real numbers except x = 0 B. all real numbers except x = 5 and x = -4 C. all real numbers D. x = 5 or x = -4 E. x> 0
Mathematics
Convert the common fraction into decimal form. If necessary, round to the nearest thousandth.
A. 4.5 B. 3.5 C. 14 D. 2.5
Mathematics
Find the missing parts of the triangle. 
If necessary, round angles to the nearest degree and give exact values of side lengths.
A. B = 90°, C = 60°, b = 6
B. no such triangle
C. B = 60°, C = 90°, b = 6
D. B = 60°, C = 90°, b = 6
Mathematics
Provide an appropriate response.Determine the quadrants in which the given point (x, y) may lie when y > 0.
A. II or III B. III or IV C. I or II D. I or IV
Mathematics