41=400[(1+r/100)^2)-1]
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Answer: 41=400[(1+r/100)^2)-1]
41=400[(100+r/100)^2 -1]
41= 400[10000+r^2+ 200r/100 -1]
41= 400[10000+r^2+ 200r-100]
41=4[r^2+200r+9900]
41=4r^2+800r+39600
4r^2+800r+39600-41=0
4r^2+800+39559=0
4r^2+442r+358r+39559=0
2r(2r+221)+179(2r+221)=0
(2r+221)(2r+179)=0
r= -221/2 , r= -179/2
Step-by-step explanation:
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