Find the unknown length in the right triangle. Simplify the answer if necessary.
A. b = 20 mi
B. b = 19 mi
C. b = 14 mi
D. b = 16 mi
Answer: D
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Fill in the blank.The opposite of -(-28) = 
.
A. -28
B. 0
C. - 
D. 28
Write the decimal in words.0.99
A. ninety-nine ten-thousandths B. ninety-nine tenths C. ninety-nine hundredths D. ninety-nine thousandths
Find the derivative of the function.
?
?
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