Helpp! 15 points.. Thankss

Rearrange the formula c^2 = a^2 + b^2 for b

The following frequency table relates the weekly sales of bicycles at a given store over a 42-week period.value01234567frequency367108521(a) in how many weeks were at least 2 bikes sold? (b) in how many weeks were at least 5 bikes sold? (c) in how many weeks were an even number of bikes sold?

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?