Solve the problem.P(x) = -x3 + 12x2 - 36x + 400, x ? 3 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. 3 hundred thousand
B. 7 hundred thousand
C. 6 hundred thousand
D. 2 hundred thousand
Answer: C
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Use a calculator with a 
key or a 
key to solve the problem.Research suggests that the probability of a certain fuse malfunctioning increases exponentially as the concentration of an impurity in the fuse increases. The probability is modeled by the function y = 4(257,911)x, where x is the impurity concentration, and y, given as a percent, is the probability of the fuse malfunctioning. Find the probability of the fuse malfunctioning for an impurity concentration of 0.12. Round to the nearest percent.
A. 4% B. 12% C. 30% D. 18%
Write the expression in the form a + bi, where a and b are real numbers.
A. -2 - 3
B. -2 - 
i
C. 2 + 
i
D. -2 + 
i
Provide an appropriate response.Explain how the equation log x = 1 could be solved using the graph of f(x) = log x.
What will be an ideal response?
Perform the indicated row operations on the following matrix. 
(-2)R1 + R2 ? R2
A. 
B. 
C. 
D. 