What is the surface area of the cone? 12 ft 9 ft A. 126 B. 216 C. 153 D. 189. pls help​

6people equally share 56 gummy worms. how many gummy worms does each person get? nine and one sixth gummy worms nine and two sixths gummy worms ten and one sixth gummy worms ten and two eighths gummy worms

If a 36 inch yardstick casts a 21 foot shadow, how tall is a building whose shadow is 168 feet? what is the scale factor

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle