Solve the problem.P(x) = -x3 + 15x2 - 48x + 450, 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. 8 hundred thousand
B. 5 hundred thousand
C. 10 hundred thousand
D. 3 hundred thousand
Answer: A
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Find the indicated quantity.a19, when a1 = -4 and d = -5
A. -99 B. 86 C. -94 D. 91
Solve the problem.Jim has gotten scores of 85 and 66 on his first two tests. What score must he get on his third test to keep an average of 75 or better?
A. at least 72 B. at least 75 C. at least 74 D. at least 75.5
Factor completely.3x2 - 3x - 18
A. 3(x - 2)(x + 3) B. 3(x + 2)(x - 3) C. Prime D. (3x + 6)(x - 3)
Solve the problem.In a local election, 38,100 people voted. This was a decrease of 5% less than the last election. How many people voted in the last election? Round your answer to the nearest whole number of people.
A. 40,105 people B. 36,195 people C. 36,286 people D. 40,005 people