exam Maths Puzzle Numerical Ability

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exam Other Question

Please help with the following, I need to show all possible solutions. thanks

Find all solutions of the equation.

x^6 - 64 = 0

thanks It takes a driver about 3/4 second to begin braking after seeing something on the road. How many feet does a car travel in that time if it is going 10mi/hr? 20mi/hr? 30mi/hr?