Please help..I'm desperate

Read the excerpt from heart of a samurai. the water was so clear, he could see straight to the bottom. a snail was making a path like a shiny ribbon slowly unfurling on the sand. what does the author use the most precise words to describe in the excerpt? the water’s movement the water the snail the snail’s path

Even the insistent cough of the woman next to him wasn't enough to draw his eyes away from the tiny type of the ancient book its pages were brittle and felt like they could crumble at the slightest disturbance he noticed the musty odor if each page as he carefully it over.

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