Perpendicular lines gradients times to get -1 so you just use a line with any y intercept but the gradient must times with the gradient you already have to get minus one.
As we know that x=x0*[1/2]n putting the values 375=3000*[1/2]n 375/3000=<span>[1/2]n </span>1/8=<span>[1/2]n simplify [1/2]3=</span><span>[1/2]n by cancelling them so n=3 so it will take 3 minutes hope it helps</span>
