Wright a easy explaining what to produce how to proceed and for whom to produce

Which sentence is written using formal language? a) erin has a crucial appointment early monday morning. b) that was a real bogus tale charlie told the teacher. c) let me have a sneak-peak or i am simply gonna explode. eliminate d) i do not think tim will be here today; he's playing hookie.

Find the center and the radius of the circle with the equation: x^-2x+y^2+4y+1=0

Changing the sentence structure and how quickly events unfold in a story can affect which literally element?