My baby is 1 week old. she formula feeds. she drinks every 2 hrs during the day 30-40mls and every 4hrs at night 50mls. is this normal?

Common: You can train them to be snackers or volume feeders based on your approach to feeds. I would encourage you to fill every bottle to at least 1/2 oz more than her regular intake & have her wait 5 min for every feed during the day until she moves to a 3-4 hr day schedule. Her day volumes should pick up.Don't confuse her desire to be held with need to feed. At night you can reduce feeds over time.