Your problem is not with mathematics. Your problem is with reading and following instructions. Re-read the instructions for posting on this site. Specifically, the instruction that says one problem per post and the instruction that says to fully explain what you don't understand and to show what you have tried so far.
John
My calculator said it, I believe it, that settles it
You can put this solution on YOUR website! Three simple Website rules
a) Limit 5 problems within 24 hours
b) No similar problems
c) Submit one problem one at a time one time See the pattern? ONE