Answer:
since the polygon has eight sides, it's an octagon and no, it's not regular since length of all sides of a regular polygon must be equal but in that octagon, not all sides are equal.
Regular price is $120
And they are on sale for 35% off.
120 * 35/100 = $42
So they are $42 off.
Then;
Sale price is $120 - $42 = $78
You should write numbers in as many ways as you possibly can to make new connections in your brain. Knowing how to write numbers in many different ways can help you solve difficult problems more easily. Doing this can also reinforce the mathematical principles and logic you have memorized. Hope this helped