-The annual interest rate <span>is 7.2%. - The </span><span>simple interest is calculated quarterly.
2. Then, to solve this exercise and calculate the </span><span>periodic interest rate of Marta's Account, you only have to divide the annual interest rate (7.2%) by 1/4 year. So, you have: </span> =(7.2%)(1/4) =(7.2%)/4 =1.8%
<span>What is the periodic interest rate of Marta's Account?
Tan(12)=-0.6358599287. That means -0.6358599287 = 10/x so you can swap the x to the other side to make x = 10/-0.6358599287 Which equals -15.7 rounded to the nearest tenth.
