2 1/2 units x 2 1/2 units Area = units

What does it mean when the bisecyer of the photosynthesis of the root of 27 equals 3

D/dx(1+x^4+x^6/x^2+x+1) a)2x-1 b)2x+1 c)2 d)0

What is "the ring of fire"? a. a type of volcanic eruption b. an area around the pacific ocean c. a circle of volcanoes forming over a hot spot d. a region around a cinder cone in which ash is likely to land