Using either the special 45-45 right triangle or the Unit circle determine what the exact value of Cos(45°) is...
-√ 2/2
-√ 3/2
+√3/2
+√2/2

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

How do you use the elimination method for this question? explain, because i really want to understand!

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?