∠A ≅ ∠D and ∠2 ≅ ∠3 is given. Write a two column proof proving that segment AE ≅ segment DE. (Please help, I don't understand)

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

In 2009, there were 1570 bears in a wildlife refuge. in 2010, the population had increased to approximately 1884 bears. if this trend continues and the bear population is increasing exponentially, how many bears will there be in 2018?

Extra points! find the missing dimension! need asap