Answer the question(s) based on the following situation: Over the last 80 years records have been kept of the annual rainfall in the Tasmanian desert. The distribution of annual rainfall is approximately normal and has no outliers. The minimum of 4.5 inches of rain occurred in 1952; the maximum of 11.7 inches of rain occurred in 1934.What is the approximate average annual rainfall over the last 80 years?
A. 3.6 inches
B. 7.2 inches
C. 1.2 inches
D. 8.1 inches
E. none of these
Answer: D
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Determine whether the two pairs of numbers are proportional.3, 100 and 27, 90
A. Yes B. No
The following table shows the number A , in millions, of traffic accidents t years after 2004. t 0 1 3 4 E 10.92 10.75 10.65 10.24? ? A: Find the equation of the regression line.B: Plot the data along with the regression line.C: Explain in practical terms the meaning of the slope of the regression equation.D: What number of accidents does the regression line predict for 2009?
What will be an ideal response?
Solve the problem.The number of years t it takes for an investment to double if it earns r percent (as a decimal), compounded annually, is t = 
. How long will it take for prices in the economy to double at a 13% annual inflation rate? Round to the nearest year.
A. 6 yr B. 23 yr C. 9 yr D. 5 yr
Perform the indicated operation. Be sure to simplify your answer.- 
+ 
A. 
B. 
C. 
D. - 