Got rich selling oil
a: thomas edison
invented the telephone
b: advertising
used the assembly line to make cars.
philanthropist
made a usable light bulb.
d: john d. rockefeller
was a steel factory owner
e: cornelius vanderbilt
is a rich person who gives back to society
f: monopoly
was successful in the railroad and shipping
industries
g: henry ford
h: andrew carnegie
was a wealthy banker.
9. a
alexander graham bell
is a business with no competition
j. p. morgan
informed people about products and services

radioactive dating, also known as  radioisotope dating  is a process that in  estimating the approximate  age  of  rocks. these data can be analyzed from  the studies dealing with the  decay of the radioactive elements that are present in these rocks. in nature, there are a few types of materials or atoms which are quite unstable and they spontaneously decay or breakdown to form other kinds of atoms.

the correct answer is a

this question shoud be under spanish category, not

answer: the x is q

explanation:

took test