Nathan invests money in an account paying simple interest. He invests $180 and no money is added or removed from the investment. After one year, he has $196.20. What is the simple percent interest per year?

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle? by using compass take the measures of angle and draw the same arc according to it.