First, you would need to find a common denominator for the two, in this case it would be 6 which would make the equation 3/6 + 4/6=7/6. Then in order to make the answer a mixed number you would need to divide the numerator into the demonanator, write down the whole number answer then write down the let's say leftovers or raminding. The final answer would be 1 1/6
If vertices A and B lie on a diameter of the circle means that angle of triangle on the vertice C is 90, si this is right triangle. Now we can use Pitagora’s theorem to find AC.
This is actually quite simple. all you need to do with a question like this is divide the interest by the principal, and you get the percent answer to the rate. the answer would be approximately 7.3%.