David Invested €4,000 for 2 years. The rate of compound interest for the two years was 4% per annum.
Calculate the total interest David earned after 2 years.
(b)
At the end of the second year David invested an extra €1,000. At the end of the third year
the investment's value was €5,592.72Calculate the interest rate for the third year.

I only need the answer for b

the sum of the lengths of any two sides of a triangle is greater than the length of the third side. if you take the three sides of a triangle and add them in pairs, the sum is greater than (not equal to) the third side. if that is not true, then it is not possible to construct a triangle with the given side lengths.

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relating to or denoting a system of numbers and arithmetic based on the number ten, tenth parts, and powers of ten.

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