Find the value of the determinant.
A. -12
B. 130
C. 80
D. -90
Answer: B
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Graph the curve over the given interval together with its tangent at the given value of x. Graph the tangent with a dashed line.y = cos(x), -2? ? x ? 2?, x = 
A. 
B. 
C. 
D. 
Perform the indicated operations and express your answer in the form a + bi. 
A. 9i
B. -9i
C. ±9
D. i
Write the ratio as a fraction in lowest terms.6 to 8
A. 
B. 
C. 
D. 
Solve the problem.A company is planning to manufacture copy machines. The fixed cost will be 
and it will cost 
to produce each copier. Each copier will be sold for 
a. Write the cost function, C, of producing x copiers.b. Write the revenue function, R, from the sale of x copiers.c. Write the profit function, P, from producing and selling x copiers.d. More than how many copiers must be produced and sold for the business to make money?
A. a. C(x) = 6000x + 78,000 b. R(x) = 12,000x c. P(x) = 6000x + 78,000 d. 13 copiers B. a. C(x) = 12,000x + 78,000 b. R(x) = 6000x c. P(x) = 6000x - 78,000 d. 13 copiers C. a. C(x) = 6000x + 78,000 b. R(x) = 12,000x c. P(x) = 6000x - 78,000 d. 130 copiers D. a. C(x) = 6000x + 78,000 b. R(x) = 12,000x c. P(x) = 6000x - 78,000 d. 13 copiers