Consider for a moment building a tree with all possible choices. The first row would contain 8 books (each possible choice for the first book). Then, the second row would contain 7 books for each book in the first row (the choices possible for the second book). Otherwise, it would be 8*7. Following this principal, we continue to multiply down to 1. 8*7*6*5*4*3*2*1. This is also known as 8!, a factorial.
Finally, 8! = 40,320
Answer:
first one
Step-by-step explanation:
it's between 3 and 4
ask me if you need explanation ♥️
Answer:
Dylan's speed 30
Mike's 20
Step-by-step explanation:
hope this helps you!
Answer: 6 times 10 Superscript 11
Step-by-step explanation:
Scientific notation is in the form ;
A.0 x 
,
where :
A = any number from 1 to 9
n = integers , that is , n must be whole numbers
Following this rule , the correct answer is
6 x 
which is 6 times 10 Superscript 11
Answer:
D
Step-by-step explanation:
crosses at a 90 degree angle
