Match each number to how it would appear in scientific notation.
a. 25,000 2.5 × 10-4
b. 250 2.5 × 10-2
c. 0.025 2.5 × 104
d. 0.00025 2.5 × 102

Which of the layers of the earth has the following three characteristics? i. it is made of molten rock. ii. it has currents that are constantly moving. iii. earth’s plates float on top of its currents.

In the late 1990s, brazil’s poor people protested about crowded cities land distribution mining permits industrial pollution

Find the coordinates of a if b(-9,-10) is the midpoint of ac and c has the coordinates of (-1,9)