exam Maths Puzzle Numerical Ability

Write an exponential function y=ab^x whose graph passes through the given points: (2,16), (3,64)

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exam Other Question

cube root of 175/cube root of 50 I have another one and I am having the same arguement with my friend. I say these have to be turned into inproper fractions before adding am I correct? Thanks so much for your help.

5 4/5 + 4 5/6 + 1 3/10 =