The equation for the circle below is x ^2 + y^2 = 100. what is the length of the circles radius?

Iam trying to solve a linear equation for the shoe size of someone 84" tall taking into consideration example 1 is 69" tall with a shoe size of 9 and example 2 is 72 inches tall with a shoe size of 11. i understand that the equation should be y=mx+b and that on the graph the answer is (3,2) but i just don't understand how to create the equation to solve for 84-inches and 60-inches tall questions. after two days, i need .

Credit card a offers an introductory apr of 3.4% for the first three months and standard apr of 15.7% thereafter,

Which of the following is an example of conditional probability