The answer would be 28.26.
The reason this would be the answer is because radius is half of a circle and diameter goes through the entire circle the formula for this problem would be
Circumference= 

and the tent has radius of 3m which means we have to multiple 3 × 3 to get 9m and then we would multiply 9 × 3.14 = 28.26
627/100 or 6 27/100 is the answer
Answer:
see explanation
Step-by-step explanation:
Note there is a common ratio between consecutive terms of the sequence, that is
- 450 ÷ 15 = 13500 ÷ - 450 = - 405000 ÷ 13500 = - 30
Thus to obtain the next term in the sequence multiply the previous term by - 30
start with 15 and multiply by - 30