[Solved] The application of reagents to enhance biological fluids at the crime scene are extremely effective in locating materials which are not visible to the naked eye. One of the more effective reagents is Luminal. Estimated Useful Life: Estimated Useful Life is the expected time period over which a fixed asset is projected to be usable for its intended purpose, affecting depreciation calculations. Normal Balance: The side (debit or credit) of an account that is expected to have a higher balance, determining the account's increase direction. Financial Statement: Reports that summarize a company's financial performance, status, and cash flows over a specified period. Permanent/Temporary: A classification that distinguishes between actions or objects that are intended to last indefinitely (permanent) and those expected to change or conclude after a certain period (temporary).