$500 to equation is same as 500x
Consider triangle WBG, where points W, B and G represent Weather Station, Balloon and Ground, respectively. This triangle is right with right angle at vertex G. The legs of this triangle are GB and GW, the hypotenuse is BW.
From the question you know that GB=4 km and GW=1 km. By the Pythagorean theorem,

Answer: nearly 4.123 km
16
Place in ascending order: 4 6 8 15 15 17 17 18 20 20
middle numbers = 15 and 17
(15+17)/2 = 16
Hello, Here is a link to the answer. I am posting this link because it is a Brainly link and a verified answer
brainly.com/question/219158