The answer is equivalent to 10*9*8 as their is one less student to go after each presentation.
720 ways.
The answer would be B-D-F
SA = 2πr² + 2πrh
• Factorize right side
SA = 2πr(r² + h)
• Divide both sides by 2πr
SA/2πr = r² + h
• Move r² to left side
h = r² - (SA/2πr)
The product of the slope of perpendicular lines is always -1
