Actual price of postage today is 46 cents for the first ounce and 20 cents for each additional ounce.
1: Construct a linear model which can be used to estimate cost of postage.
2: Use your model to estimate the postage of a package which weighs 250 grams.
3: If you are willing to spend no more than $3.00 on postage for a package, what is the most a package can weigh that you could send on budget? Please show steps.