Can you help me please and thank you!

Which activity should be part of a long-term plan to positively affect yourhealth? oa. wearing regular clothing when handling toxinsob. not worrying about secondhand smokeoc. avoiding excessive exposure to sunlightod. drinking only well water

How do i delete my account on this because i didn't read this agreements and also i put age at xd

For positive constants a and b, the force between two atoms in a molecule is given f(r) = −a r2 + b r3 , where r > 0 is the distance between the atoms. note: a and b are upper case letters. (a) find f '(r) = (b) find the critical point for f(r). r = (c) find f ''(r) = (d) find the value of r so that f ''(r) = 0.