Think About a Plan A biologist is developing two new strains of bacteria. Each sample of Type I bacteria produces four new viable bacteria, and each sample of Type II produces three new viable bacteria. Altogether, at least 240 new viable bacteria must be produced. At least 30 , but not more than 60 , of the original samples must be Type I. Not more than 70 of the original samples can be Type II. A sample of Type I costs 5 and a sample of Type II costs ($7). How many samples of Type II bacteria should the biologist use to minimize the cost?
c. Are there any implicit constraints?