Your weekly cost (in dollars) to manufacture x cars and y trucks is given by
?
?
What is the marginal cost of a car? Of a truck?
?
A. Marginal cost of a car is 
marginal cost of a truck is 
B. Marginal cost of a car is
marginal cost of a truck is 
C. Marginal cost of a car is
marginal cost of a truck is 
D. Marginal cost of a car is
marginal cost of a truck is 
E. Marginal cost of a car is
marginal cost of a truck is 
Answer: E
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Solve the given applied problem.In a particular classroom with 240 students, the rate y at which a rumor spreads is related to the number of people x who have heard the rumor according to the expression 
Determine the rate when 0.6666 of the class will have heard the rumor.
A. 6590 B. 6400 C. 6210 D. 6340
Write the sentences as a system of inequalities in two variables. Then graph the system.The sum of the x-variable and the y-variable is at least 7. The x-variable added to the product of 2 and the y-variable does not exceed -2.
A. x + y ? 7
x + 2y ? -2
B. x + y ? 7
2x + y ? -2
C. x + y ? 7
2x + y ? -2
D. x + y ? 7
x + 2y ? -2
Provide an appropriate response.Perform the operations and express in scientific notation. 
3
What will be an ideal response?
Simplify the expression.
A. 16x4 B. 2x10 C. 8x D. 2x4