Need help 8y+3y+9x+4y-5x

Factor the polynomial 4x4 – 20x2 – 3x2 + 15 by grouping. what is the resulting expression? (4x2 + 3)(x2 – 5) (4x2 – 3)(x2 – 5) (4x2 – 5)(x2 + 3) (4x2 + 5)(x2 – 3)

The function f(x) = 14,600(1.1)* represents the population of a town x years after it was established. what was the original population of the town?

An ant travels at a constant rate of 30cm every 2 minutes. at what speed does the ant travel per minute