Which equation is equivalent to 0.002 x 4.8 x 10⁶/1.6x10-²

Tomas used 3 1/3 cups of flour and now has 1 2/3cups left. which equation can he use to find f, the number of cups of flour he had to begin with? f+3 1/3=1 2/3 f-3 1/3=1 2/3 3 1/3f=1 2/3 f/3 1/3=1 2/3

(x-5)1/2+5=2 what is possible solution of this equation

I’m confused on how to work the pie charts