Answer:
a) 2.1 billion tons/yr
b) 10.5 billion people
Explanation:
Given:
Total arable land = 1.4 billion
Grain produced by each hectare of land = 1 and 2 tons annually
therefore,
The average Grain produced by each hectare of land = 
= 1.5 tons/yr
Therefore,
The total grain produced annually
= average Grain produced × Total arable land
= 1.5 × 1.4 billion
= 2.1 billion tons/yr
b) Sufficient grain for each people = 200 kg
Now,
1 ton = 1000 kg
thus,
2.1 billion tons = 2.1 × 10⁹ × 1000 kg = 2.1 × 10¹² kg
The number of people Earth can support = 
or
The number of people Earth can support = 
or
The number of people Earth can support = 10.5 × 10⁹ people
= 10.5 billion people
If you have a questioned item on your travel account bill, the first person you should contact in this situation is: The merchant
Before you contact the producer of the card,you need to make sure that:
- The merchant did not falsely include the unknown item in your purchasing price, or
- YOU include the unknown item but you forget about it
here is the poem! hope you like it :)
Explanation:
There are some economic ways to live
to prevent monitary disaster
try being thoughtful when you try to give
you will always grow happier faster
conserve and waste not for it shall have cost
money you save is the money you earned
it is hard to get back what you have lost
show every one the knowledge you have learned
try to buy what you need and nothing more
being over indulgence is not good
do not hang out at the department store
would try to go to the park if I could
it's very good for ecnomy to spend
but all the wastifulness has to end
a.) The required probability is 0.1655.
b.) The required probability is 0.4752.
c.) The required probability is 0.9004.
Solution is attached.
