A. A population with an annual growth rate of 3% doubles roughly every years. b. A population with an annual growth rate of 4% doubles roughly every years.
c. A population with an annual growth rate of 7% doubles roughly every years.

a.

And you can round 33.(3) to 33.

b.

and the final result is 25.

c.

And you can round 14.29 to 14.

Explanation:

First of all, you have to find how many times the growth rate would multiply to get closer to 100%. So if you multiply 3 times 33 you'll get 99. So, a population with an annual growth rate of 3% doubles roughly every 33 years.

This solution is just for annual growth rate that is one year long.

the correct answer is c   with the systems

multiplying and dividing the two decimals and the eqations by the same number of the overalls