A petri dish starts off with 10 bacteria, and the bacteria population doubles every hour. How many bacteria are in the petri dish after 8 hours?
y = a bx a: start value, b: multiplier. x: number of intervals.
We first write an exponential model for this situation, then plug in
a = 10, b = 2, x = 8
y = 10 × 2x
y = 10 × 28
y = 10 × 256
y = 2560 bacteria