Answer:
it's 10. ten cannot be divided into 3 with whole number answer. 10 cannot be a triangular number that can be divided by 3
You get 158.667 yards of yarn
Explanation-You dived the length value by 3 since 3 feet = 1 yard
The answer is 18^8 because u add exponents
Samuel exercises for 100 minutes each day. Or in other words, 1 hour and 40 minutes.
For 8 rooks
Without conflict (i.e. there is no row or column can contains 2 rooks)
then there are 8 choices for the first one in the first column, 7 choices in the second, ...1 choice in the last (eighth) column for a total of
8!=40320 ways.
Unlimited conflicts
there are 64 choices for the first, 63 for the second, .... 57 for the last, for a total of 64!/56!=178462987637760 ways
Similarly, for n rooks, with unlimited conflicts, there are
64!/(64-n)! ways
