How did the indigenous people of Northern Mexico meet their need for food?

Why is the price of rice so important? a. rice prices must be kept within reach of the poorest peopleb. rice prices must make a large profit or no one will grow itc. rice prices impact the cost of fruits and vegetables on neighboring farmsb. rice prices have no real importance other than to large corporations

Given: circle a externally tangent to circle b. how many possible common tangents to circles a and b can exist? 2 3 4

How many time zone are there on earth