A community group bought 30 tickets to an amusement park at a total cost of $810. They bought x student tickets for $25 each and y adult tickets for $30 each. *** let x=number of student tickets bought 30-x=number of adult tickets bought ..
25x+30(30-x)=810 25x+900-30x=810 5x=90 x=18 30-x=12 number of student tickets bought=18 number of adult tickets bought=12
so divide your circumference by 3.14 or pi and you get 4 the square root of 4 is 2. 