Simplify. Express the answer using positive exponents.
A. t
B. t9
C. t8
D. 
Answer: C
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Suppose that ? is in standard position and the given point is on the terminal side of ?. Give the exact value of the indicated trig function for ?.(18, 24); Find csc ?.
A. 
B. 
C. 
D. 
A tank initially contains 150 lb of salt dissolved in 400 gal of water. Saltwater containing 5 lb of salt per gal enters the tank at the rate of 5 gal per min. The mixture (kept uniform by stirring) is removed at the same rate. How many pounds of salt are in the tank after an hour?
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Solve the problem.A salesperson has two job offers. Company A offers a weekly salary of $450 plus commission of 18% of sales. Company B offers a weekly salary of $900 plus commission of 9% of sales. What is the amount of sales above which Company A's offer is the better of the two?
A. $10,000 B. $5100 C. $5000 D. $2500