Solve the problem.Fireworks are launched into the air. The quadratic function 
models the fireworks' height, y, in feet, x seconds after they are launched. When should the fireworks explode so that they go off at the greatest height? What is that height? (Round answers the nearest hundredth.)
A. -6.22 sec, 612.77 ft
B. 6.22 sec, 624.77 ft
C. 6 sec, 199 ft
D. 1104 sec, 6 ft
Answer: B
Mathematics
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A. 
B. 
C. 
D. 
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Simplify. Write your answers in the form of a+bi, where a and b are real numbers.(8 - 
) (4 + 
)
A. 4388 + 1112 i B. 98 - 64 i C. -98 + 64 i D. 98 + 64 i
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Factor.11z2 - 55z
A. 11(z2 - 5z) B. 5z(11z - 1) C. 11z(z - 5) D. 11z(z - 44)
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Identify the graph of the equation.
Mathematics