Solve.John owns a hotdog stand. He has found that his profit is represented by the equation 
with P being the profit in dollars, and x the number of hotdogs sold. How many hotdogs must he sell to earn the most profit?
A. 24 hotdogs
B. 30 hotdogs
C. 49 hotdogs
D. 31 hotdogs
Answer: B
Mathematics
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Solve the problem.Using the following properties of a twice-differentiable function y = f(x), select a possible graph of f.
A. 
B. 
C. 
D. 
Mathematics
Simplify
Mathematics
Solve the system. x + y + z = 1 x - y + 4z = -42x + y + z = -3
A. (1, -4, 4) B. (-4, 4, 1) C. (1, 4, -4) D. No solution
Mathematics
Solve the problem.The marriage rate in a certain country in 1990 was 0.94%, and there were about 373,000 marriages that year. Use the model M(t) = M0(1 + r)t, with a constant marriage rate and t = 0 corresponding to 1990 to estimate the number of marriages in 1999.
A. 405,769 B. 0.00213727 C. 213,727 D. 837,268
Mathematics