Solve the problem.A person standing close to the edge on top of a 64-foot building throws a baseball vertically upward. The quadratic function 
models the ball's height above the ground, s(t), in feet, t seconds after it was thrown. After how many seconds does the ball reach its maximum height? Round to the nearest tenth of a second if necessary.
A. 1.5 seconds
B. 2 seconds
C. 128 seconds
D. 4.8 seconds
Answer: B
Mathematics
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Perform the indicated operations, expressing the answer in simplest form with rationalized denominators.
A. 5
B. 5x
C. 
D. 25x
Mathematics
Solve the problem.Find all points of the graph of f(x) = 3x2 + 9x whose tangent lines are parallel to the line y - 63x = 0.
A. (10, 390) B. (11, 462) C. (12, 540) D. (9, 324)
Mathematics
Evaluate the determinant.
A. 121 B. -41 C. -27 D. 41
Mathematics
Solve the problem.Daniel is 70
in. tall and his brother Tyler is 67
in. tall. How much taller is Daniel?
A. 2
in.
B. 2
in.
C. 3
in.
D. 3
in.
Mathematics