Afull lake begins dropping at a constant rate. after 4 weeks it has dropped 3 feet. what is the unit rate of change in the lake's level compared to it's full level?

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x

The slope of cd is which segments are perpendicular to cd ? select each correct answer. gf , where g is at (6, 5)and fis at (10, 2) ef, where e is at (4, 1) and f is at (7,5) lm , where lis at (-2, 3) and m is at (-10, 9) jk , where jis at (1, -2) and k is at (10, – 14) next

Find the value of x. also give me an explanation so i can complete it to other questions as well, : )