Solve the problem.How many gallons of a 30% alcohol solution must be mixed with 60 gallons of a 14% solution to obtain a solution that is 20% alcohol?
A. 7 gal
B. 27 gal
C. 12 gal
D. 36 gal
Answer: D
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Provide an appropriate response.List all positive integer pairs that have a product of 30.
A. 3, 10; 5, 6 B. 1, 30 C. 1, 30; 2, 15; 3, 10; 5, 6 D. 2, 15; 3, 10; 5, 6
Add or subtract. Assume all variables represent positive real numbers.6
+ 8
A. 14
B. 14
C. 6
+ 8
D. 48
Solve the problem.A drippy faucet wastes 48 oz of water a day. If there are 12 million such drippy faucets, how much water, in gallons, is wasted in a day?
A. 576 gal/day B. 4,500,000 gal/day C. 18,000,000 gal/day D. 9,000,000 gal/day
Solve the problem.The function f(t) = -0.15t2 + 0.53t + 30.4 models the U.S. population in millions, ages 65 and older, where t represents years after 1990. The function g(t) = 0.56t2 + 12.6t + 105.6 models the total yearly cost of Medicare in billions of dollars, where t represents years after 1990. What does the function 
represent? Find 
(10).
A. Cost per person in thousands of dollars. $0.07 thousand B. Cost per person in thousands of dollars. $0.18 thousand C. Cost per person in thousands of dollars. $8.97 thousand D. Cost per person in thousands of dollars. $13.89 thousand