Solve.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? Round to the nearest second.
A. 9 sec
B. 21 sec
C. 28 sec
D. 7 sec
Answer: A
Mathematics
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Find a quadratic equation with integer coefficients that has the given solution set.{-7, -10}
A. x2 + 3x + 70 = 0 B. x2 + 17x + 70 = 0 C. x2 - 17x + 70 = 0 D. x2 - 3x - 70 = 0
Mathematics
Use L'H
pital's rule to find the limit.
A. - 
B. 0
C. -1
D. -5
Mathematics
Find the area of the region specified in polar coordinates.the region enclosed by the curve r = 8 + cos ?
A. 
?
B. 65?
C. 
?
D. 43?
Mathematics
Find the equilibrium solution of the equation of change 
. Round your answer to two decimal places, if nessary.
?
A. 
B. 
C. 
D. 
Mathematics