21 students each student has ten finger was the total

At the beginning of the day, stock xyz opened at $6.12. at the end of the day, it closed at $6.88. what is the rate of change of stock xyz? a. 1.17% b. 11.0% c. 12.4% d. 81.5%

Can you me find the missing length. i attached an image.

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