Jose predicts that the value of his car will decrease exponentially by 25% over the next 4 years. If Jose prediction is correct, how much will his car be valued at, to the nearest thousands dollars after 4 more years ? Marking

This is the graph x=1

Answer is either b or c

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.