Craig bought a 3 foot long baguette and made 4 equal sized sandwiches with it. What portion of the baguette was used for each sandwich

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

Timmy uses 1 1 2 cups of sugar for every 2 gallons of lemonade he makes. how many cups of sugar would timmy use if he makes 13 gallons of lemonade?

If f(x)=x+7 and g(x)=1/x what is (fog)(x)