Solve the problem.How many liters of a 30% alcohol solution must be mixed with 50 liters of a 90% solution to get a 50% solution?
A. 15 L
B. 10 L
C. 150 L
D. 100 L
Answer: D
Mathematics
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You sell cookies for 84 cents each. You paid $9.85 for ingredients to make the cookies. Which of the following is a correct formula for the profit P, in dollars, you make from baking and selling c cookies? ?
A. 
B. 
C. ?
D. None of the above
Mathematics
List the numbers that precede and follow the given number in the given base.689
A. 679; 1019 B. 669; 729 C. 679; 709 D. 679; 719
Mathematics
Provide an appropriate response.84 is 42% of what number?
A. 50 B. 0.5 C. 200 D. 2000
Mathematics
A point on the terminal side of angle ? is given. Find the exact value of the indicated trigonometric function.(3, 4)Find cos ?.
A. 
B. 
C. 
D. 
Mathematics