Ascientist is measuring the temperature change in a chemical
compound. the temperature dropped 11 °f per hour from the
original temperature. after 4 hours, the temperature was
90 °f. find the compound's original temperature.

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.

Larry wants to buy some carpeting for his living room. the length of the room is 4 times the width and the total area of the room is 16 square meters. what is the length of the living room

Which angle of rotation is an angle of rotational symmetry for all figures?