Solve the problem.If h = -16t2 + 160t represents the height of a firework, in feet, t seconds after is was fired, when will the firework be 400 feet high?
A. -5 sec
B. 5 sec
C. 80 sec
D. 25 sec
Answer: B
Mathematics
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Evaluate the expression.(-7)2
A. -14 B. -49 C. 14 D. 49
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Find all real numbers that satisfy the equation.cos 2x = 
A. 
B. 
C. 
D. 
Mathematics
Write the mixed number as an improper fraction.-11
A. - 
B. - 
C. - 
D. - 
Mathematics
Provide the proper response.If p is a prime number, is 
in simplified form? Explain.
What will be an ideal response?
Mathematics