HELP ME PLS EVERYTHING IS IN THE PICTURE

What is the value of the expression i 0 × i 1 × i 2 × i 3 × i 4? 1 –1 i –i

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ac=26 and ch=8, find bh.

Answer asap. you begin with 1/2 scoop of ice cream. since you're hungry, you ask the vendor for 2/7 more scoops of ice cream. then, you eat 5/8 scoops. how many scoops of ice cream are left on your cone? i will mark brainliest for first correct answer.