Solve for x. Then find the side lengths of the triangle. If needed, round to the nearest tenth of a foot 40ft. 2x ft. 4x ft

actually what is a question i don't understand

amount of apples bought =$ 2.6

amount of peaches bought =$ 1.475

amount given by you to cashier= $ 20

amount received by me= amount given by you to cashier -   [amount of apples bought +amount of peaches bought]

                                        = 20   - [1.475 + 2.6]

                                        = 20 -   [ 4.075]

                                        =   $15.925

so, change received by me = $15.925

if the distance from d to d' is 10 and the distance from a to d is 2, what is the scale factor