\[t = 2\]

\[-10t + 20 = 0\]

\[C(x) = 2x^2 + 10x + 50\]

Setting the velocity equal to zero:

A rectangular garden measures 15 meters by x meters. If the area of the garden is 150 square meters, find the value of x.

A company produces x units of a product per day, and the cost of producing x units is given by:

The profit is the difference between revenue and cost: