If a stand age is 40 years with a 56789 pesos total cost at a rotation age and 54321 total income at a rotation age, what will be its land expectation value at
5% interest rate? Show your solution.​

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.