What is the cardinality of the set {x∈ℤ|−2≤x≤2}?

Mr switzer needs to buy new 1-foot tiles to cover his bathroom floor. the floor is 12 feet long and 8 feet wide. each square foot of tile will cost $1.79. in dollars what will be the total cost of the tiles he needs to buy.

What is the distance between the points (2 -3) and (-6 4) on the coordinate plane

If the scale factor between two circles is 2x/5y what is the ratio of their areas?