Anna does sit-ups to get ready for her first triathlon. when she starts, she does a sit-up every 222 seconds. but, as she gets tired, each sit-up takes longer and longer to do. is the number of sit-ups anna does proportional to the time she spends doing them?

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Y=21.95x+10 y=22.45x solve by substitution

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?