Can someone solve this?

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?

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.

Evaluate-27 ^4/3/8 a) - 81/16 b) 81/16 c) 16/81