A20° sector in a circle has an area of 21.5π yd². what is the area of the circle?

Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.

You dug a hole that was 8 feet deep. after taking a short break, you dug down 3 more feet in the same hole. when finished digging, a tractor accidentally filled the hole with 4 feet of dirt. how deep is your hole now?

Apackage of five erasers cost 0. $.39 at this rate how many how much would 60 erasers cost in dollars and cents