Acompany designed and sells an ultrasonic receiver, which detects sounds unable to be heard by human ear. the receiver can detect mechanical and electrical sounds such as leaking gases, air, corona, and motor friction noises. it can also hear bats, insects, and even beading water. the receiver is 21 in deep. the focus is 7 in from the vertex. find the diameter of the outside edge of the receiver.

Pleasseee important quick note: enter your answer and show all the steps that you use to solve this problem in the space provided. use the circle graph shown below to answer the question. a pie chart labeled favorite sports to watch is divided into three portions. football represents 42 percent, baseball represents 33 percent, and soccer represents 25 percent. if 210 people said football was their favorite sport to watch, how many people were surveyed?