Solve for X, to two decimal places:
(4000) (1.045)^[.07x] = 5000
(4000) (1.045)^[.07x] = 5000
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Divide both sides by 4000
(1.045)^[.07x] = 1.25
Log (base 10) of 1.045 = 0.01911629044707
Log (base 10) of 1.25 = 0.09691001300806
0.09691001300806 / 0.01911629044707 = 5.069498879836
5.069498879836 / 0.07 = 72.42141256909
(1.045)^[.07x] = 1.25
Log (base 10) of 1.045 = 0.01911629044707
Log (base 10) of 1.25 = 0.09691001300806
0.09691001300806 / 0.01911629044707 = 5.069498879836
5.069498879836 / 0.07 = 72.42141256909