exam Maths Puzzle Numerical Ability

You deposit $2000 in an account that pays 2% annual interest compounded quarterly. How long will it take for the balance to reach $2400?

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exam Other Question

Can I have some help finding the inverse function of f?

f(x)=1/(-10 x^2 + 6),text( )x>=0
The manager of an orange grove is trying to decide when to pick the oranges. If they are picked now, the average yield per tree will be 80 kg, which can be sold for $1.20 per kilog