Question 121237
x = e^-7.85 
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Find the nat log of both sides:
ln(x) = ln(e^-7.85)
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Use the log equivalent of exponents
ln(x) = -7..85*ln(e)
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We know nat log of e is 1 so we just have:
ln(x) = -7.85
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Find the anti log of -7.85, that's {{{e^x}}} on the calculator
x = 3.897519683 E -4 is the solution from my calc
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You can see that it could be written in scientific notation
x = 3.90*10^-4
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