1. On 4 June 2010, John saved 2,000 in an account that offered simple interest rate 10% per annum. Find the amount in the account on 1 December 2010 using
exact time and exact simple interest.(2098.63)

2. A sum of money was deposited on 2 January 2007 in an investment fund which
offered 10% simple interest. On 30 June 2007, 12499 was withdrawn from the
fund. Find the initial deposit using Banker's rule.(11906.96)

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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.