An infection of 5 micro-grams in the bloodstream grows by 9% per hour. How many micro-grams will be in the bloodstream after 8 hours?

55/i dont know i do it for the points

step-by-step explanation:

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answer:   x (x+6)^2, choice b

discussion:

factor x out of the equation:

x^3 + 12x^2 + 36x = x (x^2 + 12x + 36).

note that 6+6 = 12 and 6*6 = 36 so the above factors into:

x (x+6)^2

which is choice b

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step-by-step explanation:

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