Answer:
This statement is sonetimes true
Answer:
B
Step-by-step explanation: its b
Answer:
1680 ways
Step-by-step explanation:
From the question,
nPr = n!/(n-r)!.................. Equation 1
Where, n = Total number of books to chose from, r = number of books to be arranged in the shelf.
Given: n = 8 books, r = 4 books.
Substitute into equation 1
8P4 = 8!/(8-4)!
8P4 = 8!/4!
8P4 = (8×7×6×5×4!)/4!
8P4 = 1680 ways.
Hence the number of ways 4 books can be arranged in a shelf if there are 8 books to chose from is 1680 ways
The square root of 39 = 6.2445
Comparing to the 6.51326, it has a difference of 0.268262. Therefore, 6.51326 is greater than square root of 39.
You can use the slope formula to get this, y=3/4x+1/4