Which of the following shows 9,653,000,000 written using scientific notation?
96.53 * 107
9,653 * 106
9.653 * 109
9.6 * 109
In 1990 there were about 5 million cell phones being used in the United States. By 1998 that number had increased to 69 million. Which of the following shows the increase in cell phone use?