For his mathematical project, he compared two ways to estimate the square root of an integer, a number with no fractional parts.

VOA: special.2011.03.24

The researchers asked parents to estimate the number of cigarettes smoked near each child.

VOA: special.2009.01.13

Because the tunnel economy is clandestine, it's difficult to estimate just how much money is being made.

VOA: standard.2010.06.17

"They are so complicated that if you tried to estimate how many ways you can make a snowflake, you get a huge number not just billions or trillions, but bigger than the number of atoms in the universe.

VOA: standard.2009.12.19

This week,government scientists raised their estimate of the leak to between thirty-five and sixty thousand barrels of oil each day.

VOA: special.2010.06.19

At that rate,officials estimate that more than one hundred thousand people will be able to climb to the top each year.

VOA: special.2009.06.29

Phil Sumrall says NASA's estimate to keep the Ares program going forward as planned calls for three billion dollars in additional spending a year.

VOA: special.2009.12.30

This was an estimate of the number of words a six-year-old should be able to read.

VOA: special.2010.05.02

"The lakes are very treacherous. There's over six thousand and some estimate as high as anywhere to ten to twelve thousand shipwrecks on the Great Lakes."

VOA: special.2009.11.11

And from that they estimate how much they are going to charge."

VOA: special.2009.12.11

He says that in the Antarctic Peninsula, scientists estimate that climate change has caused temperatures to increase by two or three degrees Celsius over the past fifty years.

VOA: special.2009.06.03

"If children were exclusively breastfed for six months, continued to breastfeed up to two years, with appropriate additional food from six months onwards, we could save 1.5 million children under five years of age out the 8.8 million that we estimate to die currently every year."

VOA: special.2010.08.04

In Vietnam,Laos,and Cambodia conservationists estimate hunting and poaching have reduced tiger numbers to fewer than 30 in each country.

VOA: standard.2010.02.22

Although the legality of office betting pools varies from state to state, experts estimate that billions of dollars are wagered on the tournament.

VOA: standard.2009.03.25