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. 36 gal
B. 12 gal
C. 27 gal
D. 7 gal
Answer: A
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Solve the problem.Assume that from 1930 to 1980, the number of deaths from lead poisoning (per 100,000 people) decreased dramatically and could be modeled by 
where x is the year. Determine when, to the nearest year, this death rate was 150 or less by graphing y = f(x) and 
in [1930, 1980, 10] by [0, 200, 25].
A. 1967 or after B. 1960 or after C. 1973 or after D. 1964 or after
Evaluate the algebraic expression.5x - 9y
when x = -3 and y = -1
A. 22 B. 12 C. 4 D. -6
s is the distance (in ft) traveled in time t (in s) by a particle. Find the velocity and acceleration at the given time.s = 7t3 + 5t2 + 9t + 2, t = 1
A. v = 11 ft/s, a = 31 ft/s2 B. v = 31 ft/s, a = 11 ft/s2 C. v = 52 ft/s, a = 40 ft/s2 D. v = 40 ft/s, a = 52 ft/s2
Divide and simplify. Assume variables do not cause any denominators to equal 0.
÷ 
A. 
B. 
C. 
D. 