How do I Solve this?

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent and the median amount spent? 40 25 8 36 18 15 24 27 43 9 12 19 22 34 31 20 26 19 17 28

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b