Which pair represents opposite numbers?

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.

Asap 25 pts + brainlest to right/best answer

On a piece of paper graph f(x)=5•(0.4)^x