On a DVD, information is stored on bumps that spiral around the disk. There are 73,000 ridges (with bumps) and 73,000 valleys (w
ithout bumps) across the diameter of the DVD. What is the diameter of the DVD in centimeters? Round your answer to the nearest whole number.
1 answer:
You might be interested in
so.. let's us eliminate, say "z" first, so for that, let's pick the 1s and 2nd equations there
so, that's our first two-variables resultant
let's pick other two, and again, eliminate the same "z" variable, this time, let's use the 2nd and 3rd equations
now, we have two two-variables equations, let's use them then
and say, we'll eliminate the "y" variable from them