Solve.An arrow is fired into the air with an initial velocity of 160 feet per second. The formula 
models the arrow's height above the ground, y, in feet, x seconds after it was shot into the air. When does the arrow reach its maximum height? What is that height?
A. 6 sec; 1200 ft
B. 5 sec; 400 ft
C. 5 sec; 80 ft
D. 6 sec; 720 ft
Answer: B
Mathematics
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