David paid $9.50 for some 15 cent, 25 cent, and 45 cent stamps. He bought 38 stamps and the number of 25 cent stamps was 8 more than twice the number of 45 cent stamps. How many of each type did David buy?
on average, one-sixth of the total number of people who make dinner reservations fail to arrive. The manager also knows that he needs to fill as many tables as possible in order to make a profit. His restaurant has 20 tables and so he accepts bookings for 24 tables each night.Explain why the manager accepts 24 reservations per night. Include mathematical reasoning in you answer.
what's different between linear regression model OLS and cobb douglas model?? when we should use cobb douglas model? what test should we do to interpret that model is cobb douglas or only OLS?
A 2003 survey showed that 4.6 percent of the 250 Americans surveyed had suffered some kind of identity theft in the past 12 months. Construct a 98 percent confidence interval for the true proportion of Americans who had suffered identify theft in the past 12 months.