What is the answer??

17 in long 1.3 ft wide and 8in high what is the volume

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 360, a standard deviation of 4, and a margin of error of 2.5%