exam Maths Puzzle Numerical Ability

which number is a possible solution to this equation 2x^3-4x^2+5x-14=0.
2, 3, 5, or 0

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exam Other Question

Every machine that inputs numbers and outputs numbers is a function
True
False

The machine that multiplies an integer by 7 and then subtracts 1/2 from the result is a funct 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?