1. jackie is a toll booth employee. one day, she wrote the expression: 0.75m = 15.75
she let m represent the number of motorcycles that crossed the bridge that day.
(a) based on jackie’s equation, what information does jackie know and what information does she not know?
(b) how can jackie tell, using mental math, that the value of m must be greater than 10 but less than 100?