By going to work and then doing the right things
<span>A, B and D all contributed to Sumer's decline. In the case of A, irrigation caused the salt content of the soil to rise which made it very difficult to utilize for agriculture. As in B, Sumer had no natural barrier and was located on a flat space, making the land susceptible to weather and war. With D, the land became too wet (swampy) and could not be farmed.</span>
Answer:
640 bagels per 16 hours
Explanation:
<u>160</u> bagels per <u>4</u> hours <em>DIVIDE BOTH NUMBERS BY 4</em>
<u>40</u> bagels per <u>1</u> hour <em>MULTIPLY BOTH NUMBERS BY 16</em>
640 bagels per 16 hours