2(4+c)=67 help solve for c

Sketch one cycle if the cosine function y=2cos2theta

Over the last 8 nights, elyse earned the following in tips: {105, 120, 84, 95, 100, 132, 140}. if she earns $140 a night for the next four nights, which measure of center would increase more, the mean or median?

What is the order of these fractions from least to greatest 2/3 7/10 5/8 65/100