The following formula is used to calculate the specific gravity of a material. SG = Ï / ÏW. Where SG = specific gravity, Ï = density of the material (kg/m3), ÏW = density of water ( kg/m3). The reference density of water at 4oC (39oF) is used as the reference as these are the conditions of maximum density.
Donât throw bank statements away after six years. August 12, 2013 85237 ViewsFacebook: 808Twitter: 41. The conventional wisdom is you only need to keep bank, credit card and other personal finance documents for six years. This is because HMRC (the taxman) can only ask you to go back that far if youâre being investigated for tax purposes.
November 15, 2009. 1  Some people toss all of their bank statements into a drawer; others place them into an expanding file that never gets cleaned out. 2  Keep your bank statements for at least one year. 3  Keep copies of your bills for one year.  Keep all pay stubs for one 1  year. Tax records should be kept for seven years. The IRS has up to three years to audit you for errors, just as you have three years to file an amended return. Should the IRS suspect you under-reported your income by 25% or more, they have six years to audit. Recommendation.