PLEASE HELP DUE IN 5 MINS

Nnnnneeedd 1.find the residual if you know the actual number is 5.2 and the predicted value is 4.8

5.(04.07) two different plants grow each year at different rates, which are represented by the functions f(x) = 4* and g(x) = 5x + 2. what is the first year the f(x) height is greater than the g(x) height? year 3 year 0 year 2 year 1

You can find the constant of proportionality by finding the ratio of