Solve the problem.The hydrogen ion concentration of a substance is about 6.1 × 10-12 moles per liter. Find the pH. Round to the nearest tenth. Use the formula pH = -log [H+].
A. 11.2
B. 12.8
C. 11.6
D. -12.8
Answer: A
Mathematics
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Solve the problem.If the police have 8 suspects, how many different ways can they select 5 for a lineup?
A. 336 B. 56 C. 40 D. 6720
Mathematics
For what value of the constant c is the function f continuous on (–?, ?)?
Select the correct answer.
a. c = 1
b. c = 5
c. c = –2
d. c = –5
e. c = 2
Mathematics
Simplify the expression.y ? y3
A. y3 B. y4 C. 2y3 D. 2y4
Mathematics
Solve the problem.North Central Sales bought a new computer system. To pay for the system, they borrowed 
at 
interest for 145 days. Find the interest owed.
A. $1464.40 B. $2147.99 C. $2326.99 D. $5857.58
Mathematics