Find the angle 
by using either the table or a calculator. Round your answer to four decimal places.
?
A. 
B. 
C. 
D. 
E. 
Answer: D
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Divide. Express the quotient in lowest terms.
÷ 
A. 
B. 
C. 
D. 
Solve the problem.Each cycle of a screen saver program generates and then erases numbers of little animated figures called froobies. The formula 
models the population, P, of froobies after x minutes within a cycle. How many minutes into a cycle will the froobie population first reach 104?
A. 6 minutes B. 5 minutes C. 12 minutes D. 8 minutes
Provide an appropriate response.Assume a is positive, b is negative, and c is positive for the expressiona + ( b ? c)Tell whether the value of the given expression is positive, negative or cannot be determined.
A. Negative B. Positive C. Cannot be determined
The pH of a solution is given by the formula 
, where 
is the concentration of hydrogen ions in moles per liter in the solution. Use this formula to solve the problem.Find the pH value of a sample of lake for which [H+] = 0.00000000305. Round to the nearest tenth.
A. 8.5 B. 10.1 C. 7.3 D. 6.4