When you mean estimate do you mean by rounding the first numbers?
Answer:
D
Step-by-step explanation:$400x.30=$120
400-120=280
$280x.10=28
280-28=252
Step-by-step explanation:
3.9 percent
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Answer:
<em>The container can hold 280 liters of water.</em>
Step-by-step explanation:
<u>Proportions</u>
The water originally fills 1/8 of a container. Then 35 lt of water are poured into the container and now it's 1/4 full.
If we subtract the final portion of the tank minus the original portion of the container, we obtain the portion that was poured into.

If 35 liters of water is 1/8 of the tank, then it can hold 35*8 = 280 liters.
The container can hold 280 liters of water.