Day Five, Number 5
and Problem 37 because 38 was already posted and I didn't want to lose any of the comments.
Standard instructions for this series: No calculator allowed. Express answers in reduced form. Rationalize denominators. Radicals must be reduced. All numbers are base ten unless otherwise specified. Do not approximate radicals or π. Leave such answers as 1025π or √39, for example. Source: UVM Math Contest
answer 5 and answer 37.