Are any of the figures B, C, or D scaled copies of figure A? Explain how you know.

Give the equations of two different lines that are perpendicular to the line 3x + 4y = 7.

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?

The? half-life of a radioactive substance is 20 years. if you start with some amount of this? substance, what fraction will remain in 120 ? years