A sample of 10 college students had a mean annual earnings of $2,560 with a standard deviation of $325. Assume the population has a normal distribution. Construct a 95% confidence interval for the population mean.

Fred has a total of 62 dvd and cd. if the number of cd is three more than two times the number of dvd, how many cd does he have?

Apatient is given 50 mg dose of medicine the medicines effectiveness decreases every hour at a constant rate of 40% what is the exponential decay function that models this scenario how much medicine will be left in the patients system after 2 hours

The trigonometric ratios sine and secant are reciprocals of each other