George has a box of marbles. Each marble weighs the same amount. When George places 37 marbles on a scale, the total weight is 148 grams. Which equation
 models the weight (in grams), w, of m marbles?
 (A) W=0.25m
 (B) W=0.75m
 (C) W=4m
 (D) W=4.5m
 PLEASE ASAP!