A set of college student heights are normally distributed with a mean of 170.4 centimeters and a standard deviation of 10 centimeters.
What proportion of student heights are between 170.5 centimeters and 180.3 centimeters?
You may round your answer to four decimal places.

Aand b is what i think

No because if you do the higher number minus the lower number you will get a positive. if you do it the other way around you will get a negative number

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's