A ball is tossed into the air at 30 feet per second from a height of 7 feet. How long will it take the ball to reach the​ ground? Use the formula s=16t^2+vt+s ​, where ​velocity, initial ​altitude, and in feet after t seconds.

Use the given degree of confidence and sample data to construct a confidence interval for the population mean mu . assume that the population has a normal distribution. a laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 185 milligrams with sequals 17.6 milligrams. a confidence interval of 173.8 mgless than muless than 196.2 mg is constructed for the true mean cholesterol content of all such eggs. it was assumed that the population has a normal distribution. what confidence level does this interval represent?