Solve the problem.After t seconds the height s of an object propelled upward with an initial velocity of 3200 feet per second is given by s = 3200t - 16t2. How long after the ball is thrown up until it first reaches an altitude of 53,000 feet? (Round your answer to 2 decimal places.)
A. -15.38 seconds
B. 0.26 seconds
C. 18.22 seconds
D. 36.45 seconds
Answer: C
Mathematics
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Solve the proportion.
= 
A. 
B. 
C. 
D. 21
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Solve the problem using matrices.Jerry has 3 pieces of string. The total length is 86 inches. The sum of the two longer pieces is 73. The middle piece is twice as long as the shortest piece. What are the lengths of the 3 pieces?
A. No solution B. 6.5, 13, and 66.5 inches C. 13, 47, and 57 inches D. 13, 26, and 47 inches
Mathematics
Find the solution of the equation from the given set.-x + 6 = -8; {-20, -14, -8, 0, 8, 14, 20}
A. -20 B. 8 C. 14 D. 20
Mathematics
Decide whether the ordered pair is a solution of the given system.
A. Yes B. No
Mathematics