Solve the problem.Given the following revenue and cost functions, find the x-value that makes revenue a maximum. R(x) = 80x - 2x2; C(x) = 25x + 105
A. 40
B. 19
C. 21
D. 20
Answer: D
Mathematics
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Determine whether the given set is empty.B is the set of natural numbers less than 2.
A. Empty B. Not empty
Mathematics
Use inductive reasoning to help complete the table. Round your answer to two decimal places, if necessary.
a. 140, 162
b. 135, 450
c. 135, 162
d. 140, 450
Mathematics
Find the present value of the future amount. Assume 365 days in a year. Round to the nearest cent.$16,000 for 6 months; money earns 6.9%
A. $14,967.26 B. $15,552.86 C. $15,931.00 D. $15,466.41
Mathematics
Find a rational approximation, to the nearest tenth, for the radical expression.
A. 
B. 
C. 
D. 
E. 
Mathematics