video1.0<iframe src="https://www.loom.com/embed/e4a6dd5032d8422f9f0f2eb564504dd0" frameborder="0" width="960" height="720" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>720960Loomhttps://www.loom.com720960https://cdn.loom.com/sessions/thumbnails/e4a6dd5032d8422f9f0f2eb564504dd0-00001.jpg74p: f(x) = (x + 0.25x)(50 - x) The function f is defined above. What is the value of f(20) ?