The chemical acidity of a solution is measured in units of pH: , where  is the hydrogen ion concentration in the solution. What is 

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A.
B.
C.
D.
E. 6.800

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Answer: A

Mathematics

Find the exact value. sin(? / 8)

What will be an ideal response?

Find the root if it is a real number.

A.
B. -4
C. 24
D. 4

Multiply. Simplify, if possible.0.1(0.6n)

A. 0.7n B. 0.006n C. 0.6n D. 0.06n

Solve the problem.A movie theater charges $8.00 for adults and $5.00 for children. If there were 40 people altogether and the theater collected $272.00 at the end of the day, how many of them were adults?

A. 24 adults B. 16 adults C. 29 adults D. 10 adults