If a horse is completely healthy yes, it might live to be 40 years old, but that is a stretch. Biological factors, riding accidents, illnesses/diseases, etc. make it very hard for a horse to live for that many years. The average lifespan is 20-30 years old, depending as you said on the horse's health.
Not surprisingly, Mandarin Chinese is the most useful language for business after English, spoken by 845 million people in the worldâs second-largest economy, China. French (no. 2) and Arabic (no. 3) follow, with Spanish ranking fourth. Russian, Portuguese, Japanese, German, Italian, Korean, and Turkish followed.
1 French is the 9th most widely spoken language on the planet and the only one, together with English, to be spoken on all five continents.  60% of French speakers are under 30 years old. In most of the IOF member countries, 60% of the population is under 30 years old.