The square root of 150 is between a.10 and 11b.11 and 12c.12 and 13 d.13 and 14

Use the spider tool located on page 1 of this activity to draw a 12-pointed star for the new logo. (hint: if the spider rotates 360 degrees -- or 720 degrees or 1080 degrees -- she will be facing in the same direction in which she started. when the spider is done drawing, you want her to be facing in the same direction in which she started. she'll be making 12 rotations, all the same size, so each rotation must be some multiple of 360/12 = 30 degrees.) urgently. been stuck on this problem for around 45 minutes now.! it should be easy if you're smart enough

Can someone, me with this. i really need with this

Cd is the perpendicular bisector of both xy and st, and cy=20. find xy.