Answer:
5/6
Step-by-step explanation:
(-5/8)÷(-3/4)=(-5/8)X(-4/3)=5/8 x4/3=5/6
I believe the answer would be 6.3 feet if you use Pythagorean theorem
There are 7 ways to choose the calculus textbook at one end, then 6 ways to choose the calculus textbook at the other end. Then there are 9 ways to choose the second textbook, 8 ways to choose the third textbook, and so on. But then there are 4 ways to choose the number theory textbook, so there are 7*6*9!*4 = 60963840 ways that work.