+20 Joseph borrows $10000 from his sister kate at an annual interest rate of 10%. If the interest is compounded twice a year, how much doe she owe after 12 months?
+179 If interest is compounded twice a year, it is compounded every 6 months. Thus, after 12 months, interest will have compounded twice. 1.12∗10,000 = 1.21∗10,000=$12,100
