Answer:
Step-by-step explanation:
The unit rate of soda to juice is found by setting up a ratio with soda on top and juice on bottom:

If you divide this out, you will get 25/8 which is 3.125 cups of soda per cup of juice.
1) 8,309,127 < 8,409,127
2) 3,000,003 > 223,646
Most real number arithmetic is pretty vacuous

That's about as good a way as possible to write this particular real number. But it's far from the only way.

so

Sometimes you can factor something out and you have a common radical:

But most of them are vacuous,

We are going to round the number '3'.
Look at the first number to the right of '3', which is '9'.
That number is greater than '5', so you round the '3' to '4', and add three zeros after '4'.
Answer is: 4,000