I need help as fast as possible please Will mark BRAINLIST and will give thanks only to correct answers
Thank you so much!

Aregular polygon has angkes of size 150° each.how many side has the polygon

Certain bacteria (such as aquaspirillum magnetotacticum) tend to swim toward the earth’s geographic north pole because they contain tiny particles, called magnetosomes, that are sensitive to a magnetic field. if a transmission line carrying 100 a is laid underwater, at what range of distances would the magnetic field from this line be great enough to interfere with the migration of these bacteria? (assume that a field less than 5% of the earth’s field would have little effect on the bacteria. take the earth’s field to be 5.0 * 10-5 t, and ignore the effects of the seawater.)

Which form of pure carbon is so hard that it can be used in cutting tools?