Can someone help with any of these?

DETAILS HARMATHAP12 14.3.001. MY NOTES ASK YOUR TEAC The cost (in dollars) of manufacturing one item is given by C(x,y) = 10 + 7x + 61/ where x is the cost of 1 hour of labor and y is the cost of 1 pound of material. (a) If the hourly cost of labor is $15, and the material costs $3 per pound, what is the cost of manufacturing one of these items? $ (b) Find the partial derivative of C with respect to x. Interpret the partial derivative of C with respect to x. The cost (in dollars) of manufacturing one item will increase by $7 for a $1 increase in x if y is held constant. The cost (in dollars) of manufacturing one item will increase by $7 for a $1 increase in y ifx is held constant. The cost (in dollars) of manufacturing one item will increase by $10 for a $1 increase in x ify is held constant. The cost (in dollars) of manufacturing one item will increase by $6 for a $1 increase in y ifx is held constant. The cost (in dollars) of manufacturing one item will increase by $6 for a $1 increase in x if y is held constant. DETAILS HARMATHAP12 14.3.01 1. MY NOTES ASK YOUR TEAC Suppose that the joint cost function for two products is 60:, y) = 1100 |n(xy + 2) + 13,000 dollars. (a) Find the marginal oost with respect to x. E (b) Find the marginal cost with respect to y. E DETAILS HARMATHAP12 14.3.013.MI. MY NOTES ASK YOUR TEAC Suppose that the production function for a product is z = 4x , where x represents the number or work-hours per month and y is the number of available machines. (a) Determine the marginal productivity ofx. E (b) Determine the marginal productivity of y. E