# biology

posted by
**jess**
.

Need help with FOV area (mm2) totally confused?

im confused i have the FOV diameter they are:

4x = 5

10x = 2

40x = 0.5

a classmate told me she thinks the area for 40 x is:

pi(5/2)^2 = 19.6

not sure if that's true or how to do it for the low and medium, magnification.

please help its due in a few days!