Solve the problem.A ball is thrown downward 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. After how many seconds will the height of the ball be 40 meters?. Round your answer to the nearest tenth of a second.
A. 3.1 sec
B. 3.0 sec
C. 4.0 sec
D. 2.9 sec
Answer: B
Mathematics
You might also like to view...
Perform the indicated operation without the use of a calculator and express each answer in scientific notation.
A. 4 × 10-1 B. 4 × 101 C. 4 × 1015 D. 4 × 10-15
Mathematics
Solve the problem.Determine k so that the line y = kx + 5 is parallel to the line 5x - 4y + 40 = 0.
A. 
B. 5
C. 
D. - 
Mathematics
Write a numerical expression for the phrase and simplify it.The quotient of -12 and -2
A. 
; 
B. (-2)(-12); 24
C. 
; 
D. 
; 6
Mathematics
Evaluate the expression for the given values of the variables, if possible.n ? (m - 20)2, for m = 11, n = 7
A. 81 B. 567 C. -63 D. -567
Mathematics