The blood alcohol concentration (BAC) of a person who has been drinking is approximated by the following formula. BAC = number of oz × % alcohol × 0.075 ÷ body wt in lb - hr of drinking × 0.015.

Calculate the BAC to the nearest thousandth for a 200-lb man who, in 4 hr, has consumed three 20-oz beers, each having a 3.8% alcohol content. If the man’s weight were greater and all other variables remained the same, how would that affect his BAC?