Similar rock formations have been discovered in the United States and Portugal. These rock formations were formed at the same tirhe and are made of the same types of rocks. What could
explain how these rocks got so far apart?

m=9

step-by-step explanation:

7m+8=71 subtract   8 from 71 which is 63 than divide it by 7m   equal 9.

                             

Woah that’s a lot to read xd i’ll try though. i’ll get back t you if. i know the andwer

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom