The Smiths want to fence their square garden, which has an area of 256 square meters. If one side of the garden borders the house and therefore doesn’t need a fence, how many meters of the fence is necessary?

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.