Solve the problem.The pH of a solution is defined as pH = -log[H+], where [H+] is the concentration of hydrogen ions in the solution. The pH of pure water is 7, while the pH of lemon juice is about 2. How much greater is the concentration of hydrogen ions in lemon juice than in pure water?
A. 5 times greater
B. 10 times greater
C. 100,000 times greater
D. 10,000 times greater
Answer: C
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Find the standard divisor for the given situation. Round your answer to two decimals.A small city has 33 police officers to be apportioned among 8 precincts based on the population of each precinct. The populations are given in the following table. 
A. 628.82 B. 926.52 C. 824 D. 777.67
Rationalize the denominator. Assume that all variables represent positive real numbers.
A. 41
B. 
C. 5
D. 
Find the volume of the solid of revolution obtained by revolving the region bounded above by the curve
?
?
and below by the curve
?
?
from 
to 
about the 
-axis.
What will be an ideal response?
Solve the problem.The manager of a candy shop sells chocolate covered peanuts for $5 per pound and chocolate covered cashews for $12 per pound. The manager wishes to mix 30 pounds of the cashews to get a 
mixture that will sell for $8 per pound. How many pounds of peanuts should be used?
A. 70 lb B. 20 lb C. 35 lb D. 40 lb