Does anyone understand this?

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

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?

Find the constant of variation for the relation and use it to write an equation for the statement. then solve the equation.