The number of bacteria in a sample quadruples every 24 hours. there are 20 bacteria in the sample initially. write an equation to find b, the number of bacteria in the sample after d days.

This is an exponential growth problem of the form:

F=Ir^t  we are told that the sample quadruples every day so

4=r^1 so

r=4 then the equation becomes:

F(t)=a4^t and we are told that the initial sample, a, is 20 so:

F(t)=20(4^t)  and if we let t=days=d

F(d)=20(4^d)

X^4 + 36x^2 = x^2(x^2+36)= x*x*(x+6i)(x-6i) mark me brainliest