Solve the following problem involving a quadratic equation. Round to the nearest tenth if necessary.A ball is thrown downward from a window in a tall building. Its position at time t in seconds is 
where s is in feet. How long will it take the ball to fall 203 feet?
A. After about 7.3 seconds, the ball will have fallen 203 feet.
B. After about 2.7 seconds, the ball will have fallen 203 feet.
C. After about 3.6 seconds, the ball will have fallen 203 feet.
D. After about 2.5 seconds, the ball will have fallen 203 feet.
Answer: B
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Solve the problem.Suppose that the velocity of a falling body is v = 
(k a constant) at the instant the body has fallen s meters from its starting point. Find the body's acceleration as a function of s.
A. a = - 
B. a = 
C. a = - 
D. a = - 
Solve (x2y2 - 7) if x = 4 and y = 7.
a. 777 b. 441 c. 603,729 d. 614,656 e. 631,818
Find the exact value under the given conditions.sin ? = 
, 0 < ? < 
; cos ? = 
, 0 < ? < 
Find cos (? + ?).
A. 
B. 
C. 
D. 
Find the solution to the quadratic equation, if they exist.
2x²+ 4x+ 3= 0