Find the margin of error in estimating a binomial proportion for p=0.5 and n=400. a. 0.049 b. 0.069 c. 1.96 d. 0.0012

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

The sat and act tests use very different grading scales. the sat math scores follow a normal distribution with mean 518 and standard deviation of 118. the act math scores follow a normal distribution with mean 20.7 and standard deviation of 5. suppose regan scores a 754 on the math portion of the sat. how much would her sister veronica need to score on the math portion of the act to meet or beat regan's score?