Just need this problems solved, no need to show work or anything. Paying fg for them, lmk how much if you wanna do 1 or all.
1) y is directly proportional to x and that y=9 when x=2
a) Find the constant of proportionality k
b]Use Y= kx to find y when x=4
2)Simplify: sqrt(z^12)
3) a)Expression 9^(5/2) in radical notation
b] Evaluate the radical expression
4)Simplify Log10^7
5) Find the sum of the geometric series by using a formula 1-2+4-8+16-32+64-128+256-512