Use the ! tool to find the # of combinations.
8!/5! = 40,320/120 = 336
Answer:
I would say your right as 4 ⅕ would be 4.20.
Check the picture below.
make sure your calculator is in Degree mode.
4(r)^x=y
4(r)^(1)=2
r=1/2
y=4*(1/2)^x
Divide the number of actual pages by 2.
52/2 = 26
She will need 26 sheets of paper.
Hope this helps!