what is the percent decrease on a Tv that has been marked down from $550 to $420? round to the nearest tenth​

Lindsay is creating a bridge out of dried pasta and glue. in her plans, she sketches the graph to determine the lengths of the noodles, in centimeters, needed for the arch to increase the length of the bridge in 1 centimeter increments.which function did lindsay use to create her design? f(x) = (x – 5)2 + 8 f(x) = –(x + 5)2 + 8 f(x) = 0.5(x + 5)2 + 8 f(x) = –0.5(x – 5)2 + 8

Which of the following answers is 5/25 simplified? 1/5 5/5 2/5 1/25

How do i do this activity, is appreciated