10lbs8.5oz baby takes approximately 24oz per day. last bottle of the night was almost at 8pm and woke up at 4am for a feeding. am i under feeding her?

Hard to tell: As a general rule of thumb, infants under six months who haven’t yet started solids should be taking 2 to 2½ ounces of formula per pound of body weight over a 24-hour period. If your baby seems satisfied (doesn't continue to root and fuss after feedings, falls asleep...) and is growing and achieving milestones on time then, no, she is not being underfed. Take Care