The function f(t) = 9800(1.0015) 106 represents the change in a quantity over t decades. What does the constant 1.0015 reveal about the rate of change of the quantity? please I need this answer also if you can explain it that would be nice as well​

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.