Which is greater 11/2 or 4\8

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?

Reinel saves 30% of every pay check. his paycheck last week was 560$. how much did reniel save last week?

If a=0.333333 and b=0.55555, what is the value of a+b