Solve the problem.How much pure acid should be mixed with 7 gallons of a 50% acid solution in order to get an 80% acid solution?
A. 28 gal
B. 10.5 gal
C. 3.5 gal
D. 17.5 gal
Answer: B
Mathematics
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Write the percentage as a fraction or decimal, as indicated.Write as a decimal.99.1%
A. 0.881 B. 0.991 C. 9.91 D. 0.0991
Mathematics
Solve the problem.Attendance this year was 1.587 times greater than last year. What percent does this represent?
A. 15.87% B. 0.01587% C. 1587% D. 158.7%
Mathematics
Suppose the point (2, 4) is on the graph of y = f(x). Find a point on the graph of the given function.The reflection of the graph of y = f(x) across the y-axis
A. (-2, 4) B. (-2, -4) C. (2, -4) D. (2, 4)
Mathematics
Find the root. Assume that variables represent nonnegative values.
A. 2z
B. 
C. z12
D. z3
Mathematics