The expression below describes the number of organisms in a population of bacteria that is undergoing exponential growth. In this expression, r is the amount of growth
per time interval and x is the number of time intervals.
a(1 + r)X
What does a represent in the expression?
O the final population after x intervals
O the length of time in one time interval
O the initial size of the population
the change in population after one time interval

Could someone with number 1 and 2

Rewrite the polynomial -9x5 + 36x4 + 189x3 in factored form.

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