Acarpenter bought bolts to finish a project. in all, the bolts weighed 3 pounds. there are 16 ounces in 1 pound. if each bolt weighs 1/15 a ounce, how many bolts did the carpenter buy?

First, we should figure out how many ounces the bolts the carpenter purchased weighs.  There are 16 ounces in a pound, therefore we should multiply this number by the number of pounds (3).  

16*3= 48 ounces

Each bolt weighs 1/15 an ounce.  Therefore, to find the number of bolts that the carpenter bought, we should total weight of bolts (48 ounces) by the weight of each bolt (1/15).

48 / 1/15 = 720
The carpenter bought 720 bolts.

C. i think it is step 3