For this case we have by definition, that the circumference of a circle is given by the following formula:

Where:
d: Is the diameter of the circumference
So:

Rounding to a decimal we have:

ANswer:

Only one! Try it, there is no way to make any more
Answer: B.
Step-by-step explanation: Negatives are smaller than positive numbers
2000g
1000g=1kg
Hence 2000g =2kg
Kelly needs to add 2000g to the snack mix to make 2kg.