Astore owner buys backpacks at a certain price and sells them at a higher price. the difference is called the markup. if she pays $21 for a backpack and adds a 40% markup on the price she paid, what is the selling price?

start with a line segment pq that we will copy. mark a point r that will be one endpoint of the new line segment. set the compasses' point on the point p of the line segment to be copied. adjust the compasses' width to the point q. the compasses' width is now equal to the length of the line segment pq.

step-by-step explanation: