Determine where the function is increasing and where it is decreasing.f(x) = x2 + 4x + 4
A. increasing on (-?, -2)
decreasing on (-2, ?)
B. increasing on (-2, ?)
decreasing on (-?, -2)
C. increasing on (-?, 2)
decreasing on (2, ?)
D. increasing on (2, ?)
decreasing on (-?, 2)
Answer: B
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Write the terminating decimal as 
in simplest form where a, b ? I and b ? 0.0.386
A. 
B. 
C. 
D. 
Divide and simplify.
÷ 8
A. 
B. 
C. 
D. None of these
Solve the problem.The decay of 353 mg of a radioactive substance is given by A(t) = 353e-0.03t, where t is time in years. Find the amount left after 80 years.
A. 16 mg B. 343 mg C. 32 mg D. 31 mg
The simple interest on an investment is directly proportional to the amount of the investment. By investing $2400 in a certain bond issue, you obtained an interest payment of $111.75 after 1 year. Find a mathematical model that gives the interest I for this bond issue after 1 year in terms of the amount invested P. (Round your answer to three decimal places.) ?
A. 
B. 
C. 
D. 
E. 