exam Maths Puzzle Numerical Ability

Please help, I don't understand this problem!!!
The function KE(v)=(1/2)kv^5, given that k is a constant, is an example of power function.
Is this true or false? I think it's tru

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i need to solve this equation for x:
x^3+ 7.07x^2 + 2.72x -14.75=0
i tried factoring out an x and then applying the quadratic equation but it doesnt seem right please guide me in the right direction. thank you the sum of the digits of a three-digit number is 15. if the tens digits and the hundreds digit are interchanged. the number is increased by 360. if the units digits is 1/4 of the s