Find the perimeter of the rectangle in the area of the rectangle

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?

What is the value of the discriminant of the quadratic equation -2x = -8x + 8 and what does its value mean about thenumber of real number solutions the equation has?

After several softball games jenni has 12 hits and five walks what is the ratio of hits and walks select all correct ratios