Solve the problem.How much pure acid should be mixed with 5 gallons of a 50% acid solution in order to get an 80% acid solution?
A. 20 gal
B. 2.5 gal
C. 12.5 gal
D. 7.5 gal
Answer: D
Mathematics
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A. 
(? - 2)
B. 
(? - 1)
C. 
(? - 1)
D. 
(? - 2)
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Convert 80 ounces to pounds.
A. 20 B. 30 C. 5 D. 10 E. 60
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Write the rate as a fraction in simplest form.A biker travels 518 miles in 35 hours.
A. 
B. 
C. 
D. 
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Find the standard quota asked for. Round your answer to two decimals.A school district receives a grant to purchase 50 new computers to be apportioned among the 6 schools in the district based on the student population of each school. The student populations are given in the following table. 
Find the standard quota for school A.
A. 13.16 B. 10.01 C. 12.62 D. 11.56
Mathematics