The cost of nails varies directly with the number of pounds bought. if 4 pounds of nails cost $11.60, what is the cost of 3.5 pounds

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

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?

Find the length of the normal and the angle it makes with the positive x-axis. (see pictured below)