Use the pH scale to answer the question.If the pH of a solution increases by 2, how much does the hydrogen ion concentration change? Does the change make the solution more acidic or more basic?
A. Decreases by a factor of 100; more basic
B. Increases by a factor of 20; more acidic
C. Increases by a factor of 100; more acidic
D. Decreases by a factor of 20; more basic
Answer: A
Mathematics
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Solve the problem.What is the angle sum of a regular polygon with 7 sides?
A. 900° B. 1350° C. 450° D. 1260°
Mathematics
The circle graph shows the results of the student council presidential election. The complete circular area represents 100% of the votes.
The circle graph shows what percent of the vote each person received.How many votes did Matt get?
A. 30 B. 50 C. 56 D. 64
Mathematics
Determine whether (f(g(x)) = x and whether (g (f(x)) = x.f(x) = x2 + 5 , g(x) = 
- 5
A. Yes, no B. No, yes C. No, no D. Yes, yes
Mathematics
Solve for x.
= 39
A. -2 B. 3 C. 5 D. 24
Mathematics