need your help to answer some question

Answer the following questions
1.What is the difference between book value and market value? Which should we use for decision-making purposes? ………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………
2. * Current Accounts
2009: Current Assets= 4,400; Current Liabilities= 1,500
2008: Current Assets= 3,500; Current Liabilities= 1,200
* Fixed Assets and Depreciation
2009: Net Fixed Assets= 3,400; 2008: Net Fixed Assets= 3,100
* Long-term Debt and Equity (R.E. not given)
2009: Long-term debt= 4,000; Common stock