Using Excel, Ellen has entered all of her monthly expenses. She needs to create a formula that will deduct her monthly expenses from her monthly income. Since her monthly income is the same amount each month, she uses a(n) to identify the cell containing the income value.

George heard about the benefits of a data warehouse. he wants to try implementing one for his organization. however, he is afraid that transferring data to the data warehouse will affect transaction time. which element ensures that transactions are not affected when moving data to a warehouse? when data is transferred to a data warehouse, the a area frees the source system to continue transaction processing.