Find the sum of the first 8 terms in the sequence 2,8,32,128

Astuntman jumping off a 20-m-high building is modeled by the equation h=20-5t^2, where t is the same in seconds. a high-speed camera is ready to film him between 15m and 10m above the ground. for which interval of time should the camera film him?

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

Algebraically prove that a clockwise and counterclockwise rotation of 180° about the origin for triangle abc are equivalent rotations.