Name the original 3 countries of the Triple Alliance at the start of WWI.

Which of these countries did not lose their leader by the end of WWI?

Potassium benzoate (KC6H5COO) is a common food preservative. What is the pH of a 0.125 M  KC6H5COO solution? ( Ka value for Benzoic acid C6H5COOH= 6.46 × 10 −5)

1. When measuring weight to the nearest pound, what are the real limits for a score of  pounds? (1pt each) and 2. When measuring weights to the nearest pounds, what are the real limits for a score of  pounds?  and

Suppose we take a sample of seven households from a low- to moderate-income neighborhood and collect information on their incomes and food expenditures for the past month. The information obtained (in hundreds of dollars) is shown below (3 pts each).  Income (X) Food Expenditure (Y) 35 9 49 15 21 7 39 11 15 5 28 8 25 9 a. Find the mean and standard deviation of X. b. Find the mean and standard deviation of Y.  c. Calculate the correlation between income and food expenditure.  d. Suppose you wish to predict food expenditure (Y) from income (X) using a best-fitting straight line. Find the intercept and slope of the regression line for these data and write the equation for the line represented by these coefficients. e. Interpret the slope and intercept of the regression line you found in part (d).    f. Predict the expenditure, on average, if a household income is 39. g. Calculate the coefficient of determination. 

Find the value of z, say , such that the following probability statements are true: (2 pts each) a. P(z < z0) = .8925      b. P(-z0 < z < z0) = .99      c.  P(z > z0) = .2420      d.  P(z < z0) = .0643     

37)     38mm

32)       5mm

39)     1  3/8″

Full Scale (Metric)