managerial accounting

Hi, I have a test regarding my managerial accounting and I have the following questions 

4- The methods to approximate cost functions are not ________; managers frequently use two or more together to avoid ________ in measuring cost behavior.

A.mutually exclusive; errors                B. similar; duplication               C. complementary; errors                   D. the same; duplication

5- Which of the following is an example of using cost information for operational control?A. selection of value minus−chain function to emphasize in corporate mission

B. evaluation of process improvement efforts in a manufacturing process C. determination of Cost of Goods Sold for the income statement D. identification of capital assets to acquire for expansion purposes

6-The statement of financial position is also called the ________.
A. statement of cash flows                                                                     B. balance sheet C. statement of retained earnings                                                          D. income statement

7- The acquisition of inventory on account will ________.

A.increase assets and increase liabilities
B.decrease assets and decrease liabilitiesC. increase assets and decrease stockholders’ equityD. increase assets and increase stockholders’ equity