Which of the following statements is needed in order to prove these triangles are congruent using sss?

a
∠bca≅∠efd
b
ac≅ed
c
de≅bc
d
ab≅de

Do some research and find a city that has experienced population growth. determine its population on january 1st of a certain year. write an exponential function to represent the city’s population, y, based on the number of years that pass, x after a period of exponential growth. describe the variables and numbers that you used in your equation.