Solve the problem.A chemistry department wants to make 3 liters of a 17.5% basic solution by mixing a 20% solution with a 15% solution. How many liters of each type of basic solution should be used to produce the 17.5% solution?
A. 2 liters of 15% solution, 1 liter of 20% solution
B. 1 liter of 15% solution, 2 liters of 20% solution
C. 1.5 liters of 15% solution, 1.5 liters of 20% solution
D. 0.5 liter of 15% solution, 2.5 liters of 20% solution
Answer: C
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an.an = 
A. 1 B. 9 C. 0 D. Diverges
Calculate the instantaneous velocity for the given value of t of an object moving with rectilinear motion according to the given function relating s (in ft) and t (in s)s = t2 + 5t; 
A. -6 ft/s B. 11 ft/s C. 6 ft/s D. 9 ft/s
Use front-end rounding to round each number. Then, add or subtract the rounded numbers to get an estimated answer. Finally, find the exact answer.What is 2.922 less than 5.28?
A. Estimate: 2; exact: 2.368 B. Estimate: 3; exact: 3.368 C. Estimate: 2; exact: 2.358 D. Estimate: 2; exact: 2.362
Use properties of logarithms to expand the logarithmic expression as much as possible. Where possible, evaluate logarithmic expressions without using a calculator.log2 
A. 
log2 x - 
log2 y + 
B. 
(log2 x5 + log2 y - 2)
C. 
log2 x + 
log2 y - 
D. 
(log2 x5y - log2 4)