Question 1153305
6760=6250(1+i/n)^nt, but n=1 so it is 6250(1+i)^2
divide by 6250 and 1.0816=(1+i)^2
log both sides
0.0341=2 log (1+i)
0.0170=log (1+i)
raise everything to 10 power to remove log
1.04=(1+i)
i=0.04 or 4%

Same approach where 1.21550625=log (1+i)^4
0.0848=4 log (1+i), divide by 4 and raise to 10 power before rounding
1+i=1.05, i=5%