Find the interval of convergence of the power series. (be sure to include a check for convergence at the endpoints of the interval. if the interval of convergence is an interval, enter your answer using interval notation. if the interval of convergence is a finite set, enter your answer using set notation.) ∞(−1)n + 1(n + 4)xnn = 0

You are responsible for designing a new city. you are inspired by pierre charles l'enfant, who laid out the streets of our nation's capital. numbered streets run north and south, and lettered streets run east and west. avenues are named after states, and they intersect the streets on a diagonal. the streets are parallel and the intersections form similar triangles. 18th st. is 454 meters long and the intersection of 18th and k st. is 207 meters from connecticut ave. if 19th st. and k st. is 385 meters from connecticut ave., what is the length of 19th st.?

What percent of the circle below is shaded?

Plz hurry evaluate the expression a+b where a=8 and b=19