At the end of 3 years obi has incurred a debt of $5000 from money borrowed fromhis friend with a promise of 10% compound interest. If the interest on the money is $1050, how much did obi borrow

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.