with that straenj time leng, yu brake it up intu 2 steps . . . start=50,000$, at 9%, time=1 yr+8 months . . . . yeer 1: interest=0.09*50,000=4,500$ . .. . yu start next yeer with 54,500$ & get interest for 8/12=0.666666 yeers . . . interest2=0.09*54,500*0.666666666666666.... =(2/3) av 4905$=3270$ . . . hav at end=54500+3270=57,770