In a study, 68% of 1015 randomly selected adults said they believe the Republicans favor the rich. If the margin of error was 2 percentage points, what was the confidence level used for the proportion? Round the intermediate calculations to four decimal places, round the z value to two decimal places, and round the final answer to the nearest whole number. The confidence level is .

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. (a) what is the probability that a randomly selected bag contains between 1100 and 1500 chocolate chips, inclusive? (b) what is the probability that a randomly selected bag contains fewer than 1125 chocolate chips? (c) what proportion of bags contains more than 1225 chocolate chips? (d) what is the percentile rank of a bag that contains 1425 chocolate chips?

Sketch one cycle if the cosine function y=2cos2theta

What is the value of x in the equation7x+2y=48 when y=3