Use the table below to complete exercise 7 The table shows the dent of the three most populous states and the three least Populous states

California - debt in dollars: 407000000000- population 2012:38000000
New York-debt in dollars: 337000000000-population 2012:19000000
Texas- debt in dollars: 276000000000-population 2012:26000000
North Dakota- debt in dollars: 4000000000-population 2012: 690000
Vermont-debt in dollars: 4000000000-population 2012: 626000
Wyoming- debt in dollars: 2000000000-population 2012: 576000

A. What is the sum of the debts for the three most populous states? Express your answer in scientific notation?!

B. What is the sum of debt for the three least populous states?Express your answer in scientific notation?!

C. How much larger is the combined debt of the three most populous state than that of the three least populous states? Express your answer in scientific notation?!