Awebsite uses the formula above to calculate a seller’s rating, r, based on the number of favorable reviews, f, and unfavorable reviews, n. which of the following expresses the number of favorable reviews in terms of the other variables? f=rn/r-1 f=rn/1-r f=n/1−r f=n/r−1

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?

Someone answer asap for ! max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a. the median of max’s data is 250 b. more than half of the data points max recorded were 177 centimeters. c. a data point chosen at random is as likely to be above the mean as it is to be below the mean. d. every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi