This is a very challenging equation but I'll try my best!
<span>y-k=a(x-h)^2

</span>
1400 = Deposited money
210 = Gained money
1400 + 210 = 1610 Amount of money in savings account
9 dived by 3 = 3
so he surfed for 3 hours = 1/3 of 9
and there are 6 hours left
so he spent 6 hours building a sandcastle
9 is the answer because 1/3 = 3
Ratio of orange:green = 2:1
If there are 4 green picks then there are 8 orange picks.
Total number of picks = 4 + 8 = 12
Answer: There are now 12 picks in total.