Kitkat

A noted psychic was tested for ESP. The psychic was presented with 200 cards face down and asked to determine if the card was one of five symbols: star, cross, circle, square, or three wavy lines. The psychic was correct in 50 cases. Let p represent the probability that the psychic correctly identifies the symbol on the card in a random trial.

Referring to the information above, based on the results of the test, a 95% confidence interval for p is... (assume the 200 trials can be treated as an SRS from the population of all guesses the psychic would make in his lifetime)

I'm pretty sure my formula will be

=0.25 +- 1.984 (s/sqrt 200)

My question is how do I find s in this equation?

On Monday morning my dog started vomiting. The first three or four times that he did it, it was all undigested food from the night before. He continued vomiting atleast seven more times on Monday. Sometimes it was yellow bile and sometimes is was clear and mucousy. Sometimes the clear vomit had grass it in. He vomited a couple tmes Monday night, but when I woke up he was acting like himself. When he didn't vomit for a few hours, I made him some rice. He didn't want to eat it, but when I put it in my hand he would eat out of it. A few hours later he started vomiting again. There was more bile and all the rice came up. He vomited a few more times. Later my dad gave him a dog treat, not knowing he was still sick. Several hours after that he started vomited in very small amounts of brown liquid. I'm not sure if the coloring was from the treat or not.

He hasn't vomited at all since about ten last night. He's had a little bit of water today and kept it down. I'm not if I should take him.

Which episodes are still in June and which episode picks up at the end of summer?

I know 6.02 is still June, but after that I'm not sure.

So I've figured out how to find the angles when it is just a number like 42° to find, but I can't figure out how to solve them when there is an equation in parenthesis like (2x + 40)°. Help?