Help me please I will give 20 points if you answer correctly!

If g(x) is an odd function, which function must be an even function?

Kristen is wrapping presents for the holidays. she has a box that measures 4 ft. x 2 ft. x 2 ft. how many square feet of wrapping paper does she need to cover the box without overlapping?

Yvaries directly as x. y =90 when x=6. find y when x=13