The average amount of bacteria on the bathroom countertop is 452 bacteria per square inch. How many bacteria would you expect to find on a rectangular bathroom counter top that 1.5ft by 2ft. Round the answer to the highest place value

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.