Find the derivative of the function by using the definition.y = x5 - 3x3 + x2 - 6
A. 5x5 - 9x3 + 2x2 - 6
B. 5x4 - 9x2 + 2x - 6
C. 5x4 - 9x2 + 2x
D. x4 - 3x2 + x
Answer: C
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Express the number in scientific notation.0.000315
A. 3.15 × 10-3 B. 3.15 × 104 C. 3.15 × 10-4 D. 3.15 × 10-5
Find the mean. Round to the nearest tenth unless otherwise stated.Scores on an aptitude test: 576, 561, 346, 356, 547, 341, 358, 553, 470, 482
A. 468.4 B. 459 C. 476 D. 450
Write the expression in the form a + bi, where a and b are real numbers.
? 
A. 2
B. -2i
C. 2i
D. -2
Solve the problem.Acme Communication finds that the total revenue function associated with producing a new type of cellular phone is 
and the total cost function is 
where x represents the number of units of cellular phones produced. Find the total profit function, P(x) .
A. P(x) = -x2 + 207x - 8000 B. P(x) = -2x2 + 225x - 9000 C. P(x) = -x2 + 219x + 8000 D. P(x) = x4 - 207x2 + 8000