SOLUTION: 2000000=100000e^(.4t)

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Question 30668: 2000000=100000e^(.4t)
Answer by longjonsilver(2297) About Me  (Show Source):
You can put this solution on YOUR website!
+2000000=100000e%5E%28.4t%29+
+2000000%2F100000+=+e%5E%28.4t%29+
+20+=+e%5E%28.4t%29+
+ln%2820%29+=+ln%28e%5E%28.4t%29%29+
+ln%2820%29+=+0.4t+
+%28ln%2820%29%29%2F%280.4%29+=+t+

this is the exact answer. You could use a calculator to work out an approximate answer, such as 7.489 to 3decimal places.

jon.