Solve the problem.A projectile is thrown upward so that its distance above the ground after t seconds is 
After how many seconds does it reach its maximum height?
A. 28 s
B. 21 s
C. 7 s
D. 14 s
Answer: D
Mathematics
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Solve.(y - 7)(5y + 11) = 0
A. -7, 
B. -7, 
C. - 
, 7
D. - 
, 7
Mathematics
Solve the triangle. 
A. c = 3.88, A = 49.5°, B = 30.5° B. c = 2.88, A =49.5°, B = 30.5° C. c = 3.88, A = 30.5°, B = 49.5° D. c = 4.88, A = 30.5°, B = 49.5°
Mathematics
Perform the indicated operation. Write the answer in lowest terms.4 ? 3
A. 13
B. 12
C. 12
D. 12
Mathematics
Plot the point given in polar coordinates.(4, 30°)
A. 
B. 
C. 
D. 
Mathematics