I'm confused on simplifying square roots and rationalizing the denominator

Name the most appropriate metric unit for each measurement like the mass of cow

Which measure is equivalent to 110 ml? 0.0110 l 0.110 l 1.10 l 11,000 l

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?