What is the simple interst on $32,000 at 7% interest for 6 months?

If the cost to mail a package is an initial $5 and $0.28 for every pound the total cost to mail a package was $11.27, how much did the package weigh?

If sin(x) = 0 and cos(x) = 1, what is tan(x)?

An airplane travels at an unknown elevation before it descends 3 miles to an elevation of 15 miles. find the elevation of the plane before its descen.