Division and subtraction because the quotient is the result of a division and 'less than is a subtraction.
The nth term is
an=a1(r)^(n-1)
an=1(2)^(n-1)
a1=1
r=2
the sum of a geometric seequence is

a1=1
r=2
we want to find

(since we minus 1, the highest exponet is 9 so add 1 to make it correct)



22 because you take the smallest and largest number and subtract them so you do 81-59=22