Gold has a density of $19\mathrm{.}3$ gm$/$cm$3.$ If a gold coin has a mass of $60\mathrm{.}0$ grams and a thickness of $0\mathrm{.}300$ cm$,$ what would you estimate its diameter to be$?$ Give your answer in units of centimeters, however do not include the symbol $"$cm$"$ for centimeters or write out "centimeters" in your answer below. Including letters in the answer box will result in your answer being counted wrong $($even if it is$,$ in fact, correct$).$ Be Alert: You must keep the proper number of significant figures.