Solve these triangles. round to the nearest tenth. show work

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

Which best describes the construction of a triangle if given the segment lengths of 2 cm, 3 cm, and 5 cm? a) unique triangle b) cannot be determined c) triangle not possible d) more than one triangle

What is the sum of these mixed numbers 4 2/3+ 3 1/9