You are working for a bank. The bank manager want to know the mean waiting time for all customers who visit the bank. She has asked you to estimate this mean by taking a sample. Briefly explain how you will conduct this study. Assume the data set on the waiting times for 10 customers who visited a bank. Then estimate the population mean. Choose your own confidence level.

Adding and subtracting matricesfind the value of each variable. x = and y = would

In triangle abc, the length of side ab is 12 cm, the length of side bc is 5 cm, and the length of side ca is 9 cm. find the measure of angle a using the law of cosines.

Alake near the arctic circle is covered by a 222-meter-thick sheet of ice during the cold winter months. when spring arrives, the warm air gradually melts the ice, causing its thickness to decrease at a constant rate. after 333 weeks, the sheet is only 1.251.251, point, 25 meters thick. let s(t)s(t)s, left parenthesis, t, right parenthesis denote the ice sheet's thickness sss (measured in meters) as a function of time ttt (measured in weeks).