Solve the problem.P(x) = -x3 + 12x2 - 21x + 100, x ? 4 is an approximation to the total profit (in thousands of dollars) from the sale of x hundred thousand tires. Find the number of hundred thousands of tires that must be sold to maximize profit.
A. 10 hundred thousand
B. 4 hundred thousand
C. 13 hundred thousand
D. 7 hundred thousand
Answer: D
Mathematics
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Rationalize the numerator of the following expression and then simplify your answer.
?
?
A. 
B. 6
C. 216
D. 
E. 
Mathematics
Complete the following table of values for 
. Round your answers to two decimal places.
x 2 5 8 11 14 f(x)
What will be an ideal response?
Mathematics
Solve the initial value problem.
= x 
4, y(0) = 0
A. y = 
5 - 
B. y = 
5 - 
C. y = 
5
D. y = 
5
Mathematics
Perform the indicated operations and write the result in standard form.
A. 7 + i
B. -7 - i
C. -7 - i
D. -7 + i
Mathematics