Respuesta :

As we know that 
x=x0*[1/2]n
putting the values 
375=3000*[1/2]n
375/3000=[1/2]n
1/8=[1/2]n
simplify
[1/2]3=
[1/2]n
by cancelling them
so n=3
so it will take 3 minutes
hope it helps