exam Maths Puzzle Numerical Ability

A figure shows the graphs of f(x)=x^3 and g(x)=ax^3. What can you conclude about the value of a? My answer would be 0<a<1, but I'm unsure of my answer. Thanks for checking my an

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exam Other Question

Solve the following equation for x:

3^2^x =15

not sure how to solve this. Ive been looking for examples but have had no luck on it.

Thank you in advance for your help!
determine the domain of the function f(x)=sqrt of 3-x