Can anyone help I would really appreciate it I’m failing everything and need a boost

Acertain population of bacteria demonstrates exponential growth doubles in size every 4 days. how long will it take the population to triple in size?

Which point does not lie on the graph k(x) = 8 -3 √x a. (-64, 12) b. (125, 3) c. (343, 1) d. (8, 5)

The slope of the line whose equation is 3y = 2x - 3 is 2 2/3 3/2