Solve the problem.A foul tip of a baseball is hit straight upward from a height of 4 feet with an initial velocity of 
per second. The function 
+ 4 describes the ball's height above the ground, s(t), in feet, t seconds after it was hit. The ball reaches its maximum height above the ground when the instantaneous speed reaches zero. After how many seconds does the ball reach its maximum height?
A. 
B. 112
C. 
D. 7
Answer: C
Mathematics
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Solve the equation.4x2 - 32x + 60 = 0
A. {3, 5} B. {0, 3, 5} C. {4, 3, 5} D. {-3, -5}
Mathematics
Find the standard-form equation of the ellipse.
A. 81x2 + 25y2 = 1
B. 9x2 + 5y2 = 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics
Use the figure provided to find the requested expression.In ?ABC, vectors u and w are determined by the sides shown, where P is the midpoint of side BC. Find an expression for w in terms of u and v.
A. v - u B. 2v - u C. u + v D. u - 2v
Mathematics
An unbiased coin is tossed five times. Find the probability of the given event.
The coin lands heads all five times.
Mathematics