Kelsey, a marine biologist, has determined that the population () of Blue Whales off the coast of Antarctica varies with time, in months, (x). The
population changes have been mapped using the graph below. What is the
range of the population of Blue Whales off the coast of Antarctica from
months 0 to 10?
140
120
100
+80
-60

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.