Solve the problem.An object is propelled vertically upward from the top of a 208-foot building. The quadratic function 
models the ball's height above the ground, 
in feet, t seconds after it was thrown. After how many seconds does the object reach its maximum height? Round to the nearest tenth of a second if necessary.
A. 9.4 sec
B. 2 sec
C. 1.4 sec
D. 4 sec
Answer: D
Mathematics
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Solve the problem.The distance in miles that can be seen on the surface of the ocean is given by d = 1.4
where h is the height in feet above the surface of the water. How many feet high above the water (to the nearest tenth) would a pirate have to climb to see 15 miles?
A. 441.0 ft B. 114.8 ft C. 57.4 ft D. 5.4 ft
Mathematics
Use the information below to determine the cardinality of the set. U = {q, r, s, t, u, v, w, x, y, z} A = {q, s, u, w, y} B = {q, s, y, z}n(A ? B)
A. 5 B. 3 C. 6 D. 10
Mathematics
Find the derivative of y with respect to x.y = -cos-1 
A. 
B. 
C. 
D. - 
Mathematics
Find the area of the parallelogram.
A. A = 14 cm2 B. A = 24.5 cm2 C. A = 49 cm2 D. A = 28 cm2
Mathematics