Add.-19 + 34.69 + (-56.17)
A. -109.86
B. 109.86
C. 71.86
D. -40.48
Answer: D
Mathematics
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A. -20 - 12i B. -20 + 12i C. 20 - 12i D. 20 + 12i
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Solve the problem.The pH of a solution ranges from 0 to 14. An acid has a pH less than 7. Pure water is neutral and has a pH of 7. The pH of a solution is given by 
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A. 0.1 B. 1010 C. 10-10 D. 2.3
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A. 1 B. 5 C. 8 D. 3
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Find the sum.
A. 231.75 B. 42.75 C. 192.4 D. 274.5
Mathematics