business’s profit (in thousands of dollars) for producing x (in hundreds) items is given by the quadratic function ff(xx) = −2x^2 + 84x − 720. a. Use a graph on your calculator and the “zero” command to help find the number of items needed to be sold in order to obtain a profit. In other words, solve the quadratic inequality Write your answer in interval notation. a. Number of items (in hundreds): b. Use a graph on your calculator and the “maximum” command to find the maximum profit and the number of items needed to be sold in order to achieve the maximum profit. b. Maximum profit (in thousands): Number of items (in hundreds):

A business’s profit (in thousands of dollars) for producing x (in hundreds) items is given by the quadratic
function ff(xx) = −2x^2 + 84x − 720.

a. Use a graph on your calculator and the “zero” command to help find the number of items needed
to be sold in order to obtain a profit. In other words, solve the quadratic inequality

Write your answer in interval notation.

a. Number of items (in hundreds):

b. Use a graph on your calculator and the “maximum” command to find the maximum profit and
the number of items needed to be sold in order to achieve the maximum profit.

b. Maximum profit (in thousands):

Number of items (in hundreds):