Question 1172722
78(1.058)^t=104
1.058^t=1.333
t ln 1.058=ln 1.333
t=ln (1.333)/ln (1.058)
=5.098 years
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78*1.058^50=1307.31 billion units
104*(1+r)^50=1307.31
(1+r)^50=12.570
50 ln(1+r)=ln 12.570;
ln(1+r)=2.5313/50=0.0506
raise to e power
1+r=1.05193
r=5.193%
round at end, not intermediate calculations