Quantitive literacy

I am having trouble figuring out how to solve this. Would you be able to help me?Local phone numbers consist of seven numerals, the first three of which are common to many users. A small town's... more

In 2007, the U.S. government spent $31.8 billion on foreign aid. The entire budget was $2.77 trillion. Estimate the percentage of the budget spent on foreign aid by rounding the foreign aid budget... more

As of 2008, the world's population was about 6.7 billion people. The population of the United States in 2008 was 305 million. The area of New York City is 305 square miles. If in 2008 every person... more

You're going on a 1211-mile trip, and your car gets about 29 miles per gallon. Gas prices along your route average $1.99. Estimate the cost of gasoline for this trip by rounding the distance to... more

A 1-dollar bill is 6.14 inches long, 2.61 inches wide, and 0.0043 inch thick.    A 1-dollar bill is you spread a billion 1-dollar bills over the ground, how many square miles would they cover?... more