If f satisfies the equation of change 
, and the initial value of f is 5, find a formula for the function 
.
?
A. 
B. 
C. 
D. 
Answer: D
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Solve the problem.A field microphone used at a soccer game has a parabolic cross section and is 24 in. wide at the opening. The focus is 4 in. from the vertex. Find the depth of the microphone. Round your answer to the nearest hundredth inch.
A. 36.00 in. B. 144.00 in. C. 9.00 in. D. 4.00 in.
Solve the equation by using the quadratic formula.
?
?
A. 
and 
B. 
and 
C. 
and 
D. 
and 
E. 
and 
Tell whether the graph of the function opens up or down.P(x) = -x2 + 4
A. down B. up
Solve the problem.The total profit function P(x) for a company producing x thousand units is given by 
Find the values of x for which the company makes a profit. [Hint: The company makes a profit when 
A. x is less than 6 thousand units or greater than 14 thousand units B. x is greater than 6 thousand units C. x is between 6 thousand units and 14 thousand units D. x is less than 14 thousand units