Acarpenter has 28 nails from a previous job and needs to buy more. a store has 7 boxes of nails and each box contains 100 nails. the carpenter needs to buy at least 3 boxes. the number of nails the carpenter will have after purchasing n boxes is represented by a function. f(n)=100n 28 what is the practical domain of the function? all real numbers {328, 428, 528, 628, 728}{328, 428, 528, 628, 728} all real numbers from 3 to 7, inclusive all integers from 3 to 7, inclusive