exam Maths Puzzle Numerical Ability

A culture of bacteria obeys the law f(t)= f(0)*e^0.47*t. If 500 bacteria are present initially , and there are 800 after 1 hour, how many will be present in the culture after 5 hours?

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exam Other Question
which number is a possible solution to this equation 2x^3-4x^2+5x-14=0.
2, 3, 5, or 0
 A company makes an HD-TV that has a 63.4 inch diagonal. If the width of the screen is approximately 51.8 inches, what is the approximate height of the screen? Round your answer to the nearest Tenth.