Suppose a product's cost function is given by $\displaystyle {C}{\left({q}\right)}=-{7}{q}^{{2}}+{300}{q}$, where $\displaystyle {C}{\left({q}\right)}$ is in dollars and $\displaystyle {q}$ is the number of units produced.

Use the marginal cost function to find the approximate cost of producing the $\displaystyle {28}^{{{t}{h}}}$ unit.
Marginal cost$\displaystyle =$ Preview Question 6   dollars per unit