exam Maths Puzzle Numerical Ability

f(x)= 3-4x

Find f(a+h)

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exam Other Question

What is 30% of 200?

Help me to figure this out? Do I put this into a fraction?
Please help with this problem:Becoming a millionaire: How much would you have to invest now at 6.5% interest compounded semi-annually to have a million dollars in 40 years?