The people’s republic of China
A. The rate of photosynthesis must be greater than the rate of respiration
first 421÷ by pi
then the answer divided by 2
you divide the answer by 2 to find the radius because the radius is half the diameter
The answer to this is B. It lies west of Mississippi River and East of Rocky Mountains in the U.S and Canada.
Hope this helped :)
Have a great day <span />