What's the problem? There's no example...
We know that, Amount in Compound interest is given by :

Given : Principal = $2000
Given : Annual yield is 5% and the interest is compounded quarterly
It means : Interest is compounded 4 times in a year


Substituting all the values in the formula, we get :







X stands for the score of her first test
Y stands for the score of her second test
Help what ??? I don’t see anything