Q3: A video-game designer is using the expression 6n^4 in a program to determine points earned, where n is the game level. Simplify the expression for the n^2 level.

The perimeter of ? cde is 55 cm. a rhombus dmfn is inscribed in this triangle so that vertices m, f, and n lie on the sides cd , ce , and de respectively. find cd and de if cf=8 cm and ef=12 cm. the answer is not cd=20 and de=15. i have tried that one, it does not work.