a steamer Travels 90 km downstream in the same time as it takes to travel 60 km upstream if the speed of the stream is 5 km per hour find the speed of the steamer in still water

If two points are given,then exactly one line can be drawn through those two points.which geometry term does the statement represent

Arandom sample of 15 observations is used to estimate the population mean. the sample mean and the standard deviation are calculated as 172 and 63, respectively. assume that the population is normally distributed. a. with 99 confidence, what is the margin of error for the estimation of the population mean? b. construct the 99% confidence interval for the population mean. c. construct the 95% confidence interval for the population mean. d. construct the 83% confidence interval for the population mean. hint: you need to use excel function =t.inv.2t to find the value of t for the interval calculation.

Aubrey read 29 books and eli read 52 books what number is equal to the number of books aubrey read