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Drugs and disease free.
D & D, in the context of dating, means drug and disease. It's commonly used to say 'Drug and Disease free", or "D & D free".
d=(Iv)t+1/2(a)t2 or distance is equal to initial velocity times time plus one half the product of acceleration and time squared Added: At linear velocity: d=r.t r=rate t=time Free fall from rest, starting rate = 0 d=0.5g.t2 g=acceleration due to gravity (mean value on earth: 9.8 m/s2) t=time Combined: d= ro.t + 0.5g.t2
D or d is the Roman numeral for 500
yeah manners are obselet u can also argue that they revolve as time goes by but i think they are :D