Solve the problem using matrices.A chemist has prepared two acid solutions, one of which is 6% acid by volume, another 10% acid. How many cubic centimeters of each should the chemist mix together to obtain 50 cm3 of 
solution.
A. 22 cc of the 6% solution and 28 cc of the 10% solution
B. 4.12 cc of the 6% solution and 45.88 cc of the 10% solution
C. No solution
D. 50 cc of the 6% solution and 50 cc of the 10% solution
Answer: A
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Solve the problem.Evaluate 
at (u, v) = (1, 3) for the function z = xy - y2; x = u - v, y = uv.
A. -21 B. 4 C. 1 D. -2
Solve.A chemical solution contains 9% calcium. How much calcium is in 
of solution?
A.
| 0.18 mL |
B. 1.8 mL
C. 22.222 mL
D. 2.222 mL
Tell whether a linear model or a quadratic model is appropriate for the data. If a quadratic model is appropriate, then decide also whether the lead coefficient should be positive or negative.
A. Linear B. Quadratic; leading coefficient negative C. Quadratic; leading coefficient positive
Evaluate the sum. Round to the nearest hundredth, if necessary. 
A. -8 B. -40 C. 40 D. 256