David thinks he is overweight and calculated his bmi to be 20. david should interpret this value as his

overweight
underweight
at a healthy weight
obese

Having a BMI of 24 or less is considered a healthy weight!

Hope this helps!

At a healthy weight. Generally, a BMI 24 or below equates to a healthy weight.

you may having too much sleep.. a good night sleep consists of about 7 hours. more than that could be the reason you're still tired throughout the day.

there should be recorded video of the class under the assignments for the day