Amultiple choice test consists of 7 questions. each question has answer choices of a, b,c, and d, and only one of the choices is correct. if a student randomly guesses on each question, what is the probability that he gets at most 2 of them correct?

What percent of the circle below is shaded?

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?