 
<translate> Jackie ya hau bishiyoyi 2 wanda ya kasance 1 / 2 * 1000 feet = 500 feet tsawo kowannensu. Jackie ya hau itace na karshe wanda ya kasance 1000 + 200 feet = 1200 feet. A cikin duka, itatuwan 4 Jackie ya hau sun kasance 1000 feet + 500 feet + 500 feet + 1200 feet = 3200 feet. Matsakaicin itacen da Jackie ya hau ya kai mita 3200 / 4 bishiyoyi = mita 800. Saboda haka, amsar ita ce 800. <eng> Jackie climbed 2 trees that were 1 / 2 * 1000 feet = 500 feet tall each. Jackie climbed a final tree that was 1000 + 200 feet = 1200 feet. In total, the 4 trees Jackie climbed were 1000 feet + 500 feet + 500 feet + 1200 feet = 3200 feet. The average height tree that Jackie climbed was 3200 feet / 4 trees = 800 feet tall.
Thus, the answer is 800. 