Which of the following agricultural techniques requires more and more land to be cleared every two years due to soil exhaustion?
a)swideen agriculture
b)terraced farming
c)wet rice agriculture
d)dry rice agriculture

In the 1400s, portugal’s economy was based on a. industry b. exports c. finance d. trade

15 points need quick 1. looking at your graph and the geologic time scale during what period did this rock form? what is the age span of the rock, in millions of years? 2. this rock sample is limestone and shale. with what you know about rock formation, what type of environment did these organisms live in? 3. if some of these fossil samples were found in a rock also containing leaf fossils, could you use radiocarbon dating to determine the age of this rock? explain.

The figure is a square. its diagonals meet to form four right angles. what is the approximate value of x? 2.8 units 3.3 units 4.0 units 5.7 units