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Question: MODELING WITH DATA Annual retail sales in the United States from 1990 through the year 2000 (in billions of dollars) are given in the following table:
a. Let t 0 correspond to 1990 and use QuadReg to find a second-degree polynomial regression model based on the given data.
b. Plot the graph of the function found in part (a) in the viewing window [0, 10] × [0, 1000].
c. What were the annual retail sales in the United States in 1999 (t = 9)?
d. Approximately how fast were the retail sales changing in 1999 (t = 9)?
The sum of first 15 terms of an A.P. is 105 and the sum of the next 15 terms is 780. Find the first 3 terms of the A.P.
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what is the approximate margin of error for a 95% confidence interval?
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In 1900 ,a certain country's population was 72,028,751 and its area was 2,967,929 square miles. In 1980 ,the country's population was 276,948,879 and its area was 3,730,271 square miles. a. Find the population density of the country, to the neares..
Suppose you are in the market for a new home and are interested in a new housing community under construction in a different city.
Show that the equation AX = B represents a linear system of two equations in two unknowns Solve the system and substitute into the matrix equation to check your results
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