Solve the problem using matrices.A chemist has prepared two acid solutions, one of which is 4% acid by volume, another 11% acid. How many cubic centimeters of each should the chemist mix together to obtain 50 cm3 of a solution that is 
acid.
A. 3.12 cm3 of 4%; 46.88 cm3 of 11%
B. 20 cm3 of 4%; 20 cm3 of 11%
C. No solution
D. 34 cm3 of 4%; 16 cm3 of 11%
Answer: D
Mathematics
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According to the regression model, what is the projected weight loss for 84 days?
The following table shows the number of pounds a person lost since beginning a diet.
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A. 
B. 
C. 
D. 
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