If a polygon has 8 sides it’s an octagon, but how do i know if it’s regular or not? do i see if the sides are equal? please let me know because i’m not so sure

Which expression is equivalent to 5r6141 2r+st6

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?