The cache is not at the posted coordinates- don't go there since you'd either have to enter a gated community or ford through a swampy stream.
What's the point of having a geocaching series in you don't wait 7 years between entries? Several moves and states ago, I started a series called TILIS, aka Things I Learned in School. I made 3 caches in Ohio, 1 in Michigan, and haven't added any new puzzles to it since 2018- until now.
Arithmetic Mean
One of the earliest things you can learn to do with a set of numbers (beyond addition, subtraction, mutiple, and division) is to average them. An average can mean several different things, but in this context we're talking about taking the sum of numbers divided by the count of numbers. For example, the arithmetic mean of 6, 27, and 18 = (6+27+18)/3 = 51/3 = 17. You can also do it with decimal numbers- for example, 4.2 & 8.6 have an arithmetic mean of 6.4
There's not a single founder/inventor of the arithmetic mean, as versions of the concept exist as far back as 4 thoursand years ago when ancient Babylon used the concept in ancient astronomy. However, one man is noted to have worked with averages including decimals, which we need for this cache. Muhammad ibn Musa al-Khwarizmi (c. 780-c.850), known more simply as al-Khwarizmi, was a mathematician at Baghad's House of Wisdom, known for his work in mathematics, astronomy, and geography. With the arithmetic mean, Al-Khwarizmi transformed earlier Babylonian and Greek geometric methods into computational procedures. Instead of constructing means with compass and ruler, he introduced systematic steps using the new Hindu-Arabic decimal system (our normal 0123456789 number system). This made calculating means faster and more practical for everyday use. The term 'algorithm' is actually derived from his name!
For this cache, you'll have to take the average of 3 waypoints to find the final location. Parking is limited in this area, so I've included 2 parking waypoints to get you started. You'll want to calculate the north and west averages separately. Final is a decent walk from either parking area, this is NOT a PnG. There's a checker at the bottom of the page. Good luck!