Afirm has the following cost function c(x)=5x2+50x+10 where x is the quantity produced and c is production costs. select the three correct statements select one or more:
a. the marginal cost is 5
b. the marginal cost is 70
c. the marginal cost is increasing.
d. this firm will have an increasing supply curve.
e. the marginal cost is 20
f. the marginal cost is decreasing.
g. there is no fixed cost.
h. the marginal cost is constant.
i. the marginal cost is 10x+50

Powell company began the 2018 accounting period with $40,000 cash, $86,000 inventory, $60,000 common stock, and $66,000 retained earnings. during 2018, powell experienced the following events: sold merchandise costing $58,000 for $99,500 on account to prentise furniture store. delivered the goods to prentise under terms fob destination. freight costs were $900 cash. received returned goods from prentise. the goods cost powell $4,000 and were sold to prentise for $5,900. granted prentise a $3,000 allowance for damaged goods that prentise agreed to keep. collected partial payment of $81,000 cash from accounts receivable. required record the events in a statements model shown below. prepare an income statement, a balance sheet, and a statement of cash flows. why would prentise agree to keep the damaged goods?