Question: Differential Equations

Im sure this is very easy but im new to maple and am having some problems.

I've stored a differential equation eq1:= diff(n(t),t) + s*n(t) = 0;

I want for t=0, n(0)=N=10, how do i input that so that dsolve(eq1); will give me the answer n(t)=10e^(-0.1t).

Also once that dsolve is done and saved as eq2 is there a way i can write it so that i can put for example eq2(5); which will give me n for t=5.

Thanks so much.

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