exam Maths Puzzle Numerical Ability

find the domain of the f(t) = log(t - 5)

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exam Other Question

If a bacteria culture started with a count of 480 at 8:00 am and after t hours is expected to grow to f(t)=480(3/2)^t. I am trying to estimate the number of bacteria in the culture at noon the same day. Im very sorry i made a error on my last question the real question is how do you get k in this equation 6(k+2)+2(2k-5)=22