Derive the equation of the parabola with a focus at (0, −4) and a directrix of y = 4

Abag has more green balls than blue balls, and there is at least one blue ball. let bb represent the number of blue balls and let gg represent the number of green balls. let's compare the expressions 2b2b and b + gb+g. which statement is correct? choose 1

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply