The area of a rectangle is at least 10 more than 3 times the width of the rectangle. If the area of the rectangle is at least 250
square units, what are the possible values for the width (w) of the rectangle?
What is the possible value for the width of the rectangle

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.