A boiling pot of water (212ºF) is cooling at a rate of 3.5 degrees per hour. A second pot is heated from freezing (32ºF) at a rate of 7 degrees per hour. Based on the graph, what is the water’s temperature when the two pots are equal?

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.