A polygon is regular when all angles are equal and all sides are equal

True or False

In the past, professional baseball was played at the astrodome in houston, texas. the astrodome has a maximum height of 63.4 m. the height of a baseball t seconds after it is hit straight up in the air with a velocity of 45 ft/s is given by h = -9.8t2 + 45t + 1. will a baseball hit straight up with this velocity hit the roof of the astrodome? use the discriminant to explain your answer.

How do i do this activity, is appreciated

In a sale there is 25% of all prices a chair costs £45 in sale how much was it before the sale