What is economically wrong about the interpretation the boy makes in the last panel?

Which of the following might cause the inflation rate to spike up sharply? the purchasing power of the average consumer decreases due to a sluggish economy. plentiful rainfall and moderate temperatures result in good harvests of wheat and soybeans. the items in the cpi market basket change to account for changing consumer buying habits. prices on world oil markets rise steeply due to war in the middle east.

What greek scientist created a screw to move water for irrigation?

On a production possibility curve, data points that fall outside of the curve represent what