What is the decay factor in the function y=17*0.2^x?

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x

Ahighway between points a and b has been closed for repairs. an alternative route between there two locations is to travel between a and c and then from c to b what is the value of y and what is the total distance from a to c to b?