Can you please help me with my homework ​

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

Which best explains why this triangle is or is not a right triangle ?

Maren is buying carpet for her rectangular living room. the room is 4.8 yards wide and 5.2 yards long. how much carpet does she need to buy? enter your answer as a decimal in the box. yd2