Brenda surveyed 60 out of 500 students to find out how many walked to school She found that 12 students in her sample walked to school. What was Brenda's prediction for the total number of students who walked to school?

What point is the projection of q on a) r b) s c) t

How do i do this? i don’t understand

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?