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

What is the value of x? enter your answer in the box. (cm)

If f(x) = 2x + 2 and g(x) = x? , what is (gºf)(2)?

Titus works at a hotel. part of his job is to keep the complimentary pitcher of water at least half full and always with ice. when he starts his shift, the water level shows 4 gallons, or 128 cups of water. as the shift progresses, he records the level of the water every 10 minutes. after 2 hours, he uses a regression calculator to compute an equation for the decrease in water. his equation is w –0.414t + 129.549, where t is the number of minutes and w is the level of water. according to the equation, after about how many minutes would the water level be less than or equal to 64 cups?