Meg, sandy, chang, and nathan used different methods to protect themselves from over-exposure to the sun. their methods are listed below: meg: use a sun tanning or uv tanning booth instead of staying on the beach for long hours sandy: stop all outdoor activity and always stay indoors chang: apply sunscreen half an hour before going out and reapply every 2 hours nathan: use sunscreen with very low spf once per day who used the best method for daily activity? chang meg nathan sandy

Chang because he didn't cut out the sun all together and he waited for the sunscreen to soak in before going outside. Then as the sunscreen began to wear off he added more to his body and protected his body from sunburn but still got the vitamin D he needed. Also Nathan did the same thing but used weak sunscreen and never reapplied it. Meg is using artificial light to get tan but is not getting the vitamin D her body needs. Sandy just straight up Is not getting Vitamin D.

c8h10 is your answerr

the ratio of the conjugate base to the acid required to attain the desired ph.