Solve the problem.A chemist needs 120 milliliters of a 69% solution but has only 67% and 79% solutions available. Find how many milliliters of each that should be mixed to get the desired solution.
A. 100 mL of 67%; 20 mL of 79%
B. 110 mL of 67%; 10 mL of 79%
C. 10 mL of 67%; 110 mL of 79%
D. 20 mL of 67%; 100 mL of 79%
Answer: A
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A. 28.0 ft per minute B. 26.3 ft per minute C. 20.0 ft per minute D. 0.04 ft per minute
Use a calculator to approximate the square root to three decimal places. 
A. 427.000 B. 20.661 C. 20.664 D. 20.669
Express the sum or difference as a product of sines and/or cosines.sin(4?) - sin(2?)
A. sin ? cos(3?) B. 2 sin(3?) cos ? C. 2 sin ? cos(3?) D. sin(3?) cos ?
Divide the real numbers. Write any improper fraction as a whole or mixed number where appropriate.-2 ÷ 
A. 4
B. - 
C. - 4
D. 