An economist wants to estimate the mean per capita income (in thousands of dollars) for a major city in texas. he believes that the mean income is $20.4, and the standard deviation is known to be $8.8. how large of a sample would be required in order to estimate the mean per capita income at the 98% level of confidence with an error of at most $0.54$? round your answer up to the next integer.

Astore has clearance items that have been marked down by 60%. they are having a sale, advertising an additional 55% off clearance items. what percent of the original price do you end up paying?

In new york city at the spring equinox there are 12 hours 8 minutes of daylight. the longest and shortest days of the year very by two hours and 53 minutes from the equinox in this year the equinox falls on march 21 in this task you use trigonometric function to model the hours of daylight hours on certain days of the year in new york city a.what is the independent and dependent variables? b.find the amplitude and the period of the function. c.create a trigonometric function that describes the hours of sunlight for each day of the year. d. graph the function you build in part c. e. use the function you build in part c to find out how many fewer daylight hours february 10 will have than march 21. you may look at the calendar.

What is the slope of the line shown below?