John wants to buy a new video game it cost $39.00. he has $14.00 in his piggy bank. he works for farmer jones down the street for $5.00 an hour. how many hours will he need to work before he can buy his new video game?

Jane is trying to decide how many tv shows she should watch tonight. she gets $10 of value from each tv show she watches. if she watches one show she gives up working on her math homework (which she values at $5). if she watches two, she also gives up her economics homework (which she values at $8). if she watches three then she also has to give up her biology homework (which she values at $12). using marginal analysis, how many shows does she watch? one