exam Maths Puzzle Numerical Ability

Could you please show me how this problem would look on paper?
9t<= -8.1 My homework says to solve.Then graph

I can do some of the simple ones like: y-9>-18

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exam Other Question

I messed up the question

3a^2+15a
________
2^3-25a

Can you help me solve this
Thank you
If f(x)=x(x-1)(x-4)^2, use the interval notation to give all values of x where
f(x)>0.