In a survey, 15 people were asked how much they spent on their child's last birthday gift. the results were roughly bell-shaped with a mean of $42 and standard deviation of $3. construct a confidence interval at a 95% confidence level.

Abank gives 6.5% interest per year. what is the growth factor b in this situation?

Do some research and find a city that has experienced population growth. determine its population on january 1st of a certain year. write an exponential function to represent the city’s population, y, based on the number of years that pass, x after a period of exponential growth. describe the variables and numbers that you used in your equation.

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0