Solve the problem.A person standing close to the edge on top of a 80-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. 2 seconds
B. 5.0 seconds
C. 1.5 seconds
D. 144 seconds
Answer: A
Mathematics
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Divide in the indicated base.
A. 407 B. 357 C. 257 D. 367
Mathematics
Find the probability. Round to the nearest ten-thousandth when necessary.A coin is biased to show 45% heads and 55% tails. The coin is tossed twice. What is the probability that the coin turns up heads once and tails once?
A. 0.45 B. 0.495 C. 0.55 D. 0.2475
Mathematics
Convert to a decimal. Round to the thousandths if necessary.3
A. 3.252 B. 3.253 C. 3.255 D. 3.25
Mathematics
Identify the values for which the rational expression is undefined.
A. x = 0 B. x = 9 or x = -9 C. x = 5 or x = -9 D. x = -5 or x = 9
Mathematics