Which equation whеn graphed has x-intercepts at (2, 0) аnd (4, 0) and ay-intercept
оf (0, -16)?
f(x) = -2(x+2)(х+4)
f(x) = -2(х – 2)(х-4)
f(x) = -(х + 2)(х+4)
f(x) = -(х – 2)(х-4)

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?

Me because i don't understand how to do it.: )

Will mark kayla wants to find the width, ab, of a river. she walks along the edge of the river 65 ft and marks point c. then she walks 25 ft further and marks point d. she turns 90° and walks until her location, point a, and point c are collinear. she marks point e at this location, as shown (a) can kayla conclude that δabc and δedc are similar? why or why not? (b) suppose de = 15 ft. what can kayla conclude about the width of the river?