A contractor bought ft of sheet metal. has used ft so far and has $ worth of sheet metal remaining. The equation xx represents how much sheet metal is remaining and the cost of the remaining amount. How much does sheet metal cost per square foot? Sheet metal costs $
nothing per square foot.

The birth weights of newborn babies in the unites states follow in a normal distrubution with a mean of 3.4 kg and standard deviation of 0.6 kg. reaserches interested in studying how. children gain weights decide to take random samples of 100 newborn babies and calculate the sample mean birth weights for each sample