Investment after 20 years equals 130000. original investment was 50000. What was the interest rate?

Me 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.

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

The product of 3 and a number increased by 8 is 31 written as an equation