In 1997, the population of China was 1.24 × 109. In 2002 the population of China was 1.28 × 109. Calculate the percentage increase from 1997 to 2002.

3.225806%

Step-by-step explanation:

1.24*10^9/(1.28*10^9) = 1.24/1.28 = 1.03225806 which is a 3.225806% increase

3 is greater then both of those numbers

unless you made a typo, the answers are both a and c.

step-by-step explanation:

1.5/3 is .5 whereas 3/9 is .3333333 not proportional

22/33 is .66666 and 4/6 is also .66666 proportional

2/4 is .5 whereas 142/213 is .66666 not proportional

14/7 is 2 and 7/3.5 is also 2 proportional

you could've also checked it by doing this simple division:

if the larger fraction divides with the smaller fraction to equal 1, it is proportional. so let me show you what i mean:

when i divide 22/33 by 4/6 i get 1, so we know it is proportional, and it is the same with 14/7 and 7/3.5. now if i divide 3/9 by 1.5/3 i get .66666 so therefore we know it is not proportional.

there are many ways to do this so i wanted to show you some possible ways.