Peter buys a comic for $4. There was a discount of 20%. What is the sale price?

4$ x .8= 3.2. 3.2$ is paid

Step-by-step explanation:

answer: evaluate the objective function at each vertex to determine which - and -values, if any, maximize or minimize the function. example: find the minimum value and maximum value of the objective function f ( x , y ) = 4 x + 5 y , subject to the following constraints