D=b2 - 4ac a=2 b= -6 c = -3 work out the value of D

Aladder that is 30 ft long needs to reach 27 ft up a building. what should the angle of the vertical be?

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?

Write 37/22 as a decimal rounded to the nearest hundredth.