How old are the oldest rocks on the ocean floor?
a. less than 200 million years old
b. approximately one billion years old
c. approximately 500 million years old
d. between 200 and 500 million years old

Find the equation of the line passing through the point (–1, 5) and perpendicular to the line 3x + y = 4.

What can you learn about precipitation levels in south america from this map? brazil is experiencing a drought.it rains more in higher altitudes.peru received the highest level of rain.venezuela got less than 25 cm of rain. 

Which ecosystem best fits the characteristics listed below? which ecosystem best fits the characteristics listed below? ii. seasonal migrations of millions of wildebeests, zebras, and elephants iii. large numbers of predators, such as lions iv. acacia trees and grasses a. the congo rainforest b. the african mangroves c. the serengeti grasslands d. the sahel