# calculus

After x weeks of prcatice, a student can type f(x)=80(1-e^-0.3x)words a minute. How sooon will the student be able to type 60 words per minute? (Round to the nearest tenth)

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1. 60=80(1-e-.3x)
3/5=1-e^-.3x)

2/5=e^-.3x

ln (2/5)=-3.x

Surely you can solve it from here. This is hardly calculus.

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