Извини только английский смогла, сейчас найду, вот, держи для начала Autumn - a great time when the nature of trees painted in bright colors, yellow, red, orange! In autumn there is the most beautiful phenomenon - Falling Leaves! Of course, fall not without cloudy weather, no rain, thunderstorms, but it's just more animates nature! When I walk down the street after school, or just went for a walk, I do not want to go home. After all, nature is beautiful autumn! Autumn - my favorite time of year!
R^2+6R - 12,74=0 R=1,66 (ответ приближенный)
S=Sб+пR^2=80+2*3,14*(1,66)^2=80+6,28*2,76=97,33