$7.$ In the manafacture of Integrated Circuits, the precision of features can be as much as $5\%$ and still work well. This level of precision has facilitated the high yields in the IC industry. If you go back to problem $4$ where you are cutting $2$x$4$s for a framming up a house, answer these questions: How big is a $+/-$ error on an eight foot $2$x$4.$ Would the builders be able to accept this error in building a house