15.) negative EFFECT
- causes skin cancer
- damages the immune system
positive effects ( necessary)
- it triggers vitamin D -- VITAMINE HELPS STRENGTHEN BONES , MUSCLES AND BODYS IMMUNE SYSTEM.
- USEFUL FOR DISINFECTION AND STERILISATION
Explanation: THE EARTHS ATMOSPHERE BLOCKS MOST OF THE SUNS UV RADIATION FROM PENETRATING THROUGH THE ATMOSPHERE. THE SMALL AMOUNT THAT GETS THROUGH HAS BOTH POSITIVE AND NEGATIVE.
idk im not very smart
maybe if you go and talk to teacher they will help
the answer is 0.3175 hope that you ^w^
also you might actually want to put this picture up if you want people to solve it luckily i remember this question
the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing