This is the concept of application of geometry and financial mathematics; To calculate for the total cost of the carpet we proceed as follows; Total cost=[area of the carpet]*[price per square yard] area of carpet is given by: Area=πr^2 where; radius,r=6 yeards =π*6^2 =113.1 square yards therefore the price of the carpet will be: 113.1*14 =$1,583.4
Four of the 7 students got a sticker, so you need to turn that into a percent. To do that, divide 7 by 4, which gives you .57. That means that 57% of students got a sticker.