Use the equation e^x+e^-x/e^x-e^-x=t tosolve for x

Step-by-step explanation:

I assume that the equation is

Let u = e^x

if u=1, then

then u = 0 (reject) or u = t

So far, we have u = 1 and u = t

if u =1, e^x =1 , then x = 0

if u = t, then e^x = t or x = lnt

$450 is the answer.

step-by-step explanation:

30% of 450 = 135

450-135=315

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