1 Small residential projects tend to cost more per square foot and may be subject to a minimum charge of $500-$1,000 or more. 2  Resurfacing an average 500-square-foot concrete driveway typically costs $2,000-$5,000. ThisOldHouse.com estimates it took two people five hours and six bags ($150-$180) of material to resurface a 9'x27' driveway and a 3'x18' walkway (about 300 square feet). 2  Renting a pressure washer to clean the existing concrete before resurfacing can add $40-$75 to the total DIY costs.
At what point you declare someone mentally mature is hard to define but given that wisdom from life experience would be a good indicator of maturity then the age of someone would imply more life experience. It depends if they have learnt from it I guess.
The analysis of over ten thousand histories in the United States and Canada by Engelmann showed that the average age at which menstruation begins (menarche) is 13.9 years. [Footnote:] The question of early maturity is not so much one of [geographic] latitudes of the immediate environment of clothing and house heating.ecline in the age of appearance of the menarche during recent decades, from roughly 17 years in 1830 to less than 13 years a century and a half later.. The chart comes from Holland, but probably generally applies to America and western Europe. That line looks too straight to be true.