Solve for x. the polygons are similar

Ngrid mixes 3.6 pounds of almonds with some raisins to make a trail mix. she divides the trail mix into 12 equal portions. each portion weighs 0.7 pound. how many pounds of raisins did she use to make the trail mix? express the answer to the nearest tenth.

Olivia uses the work below to determine 55% of 720 which explains the error in olivia’s solution

Use the x-intercept method to find all real solutions of the equation.x^3-10x^2+27x-18=0