I decided thirty-five was the best estimate of her age.

The likelihood of permanent brain damage from any given instance of severe hypoglycemia is difficult to estimate, and depends on a multitude of factors such as age, recent blood and brain glucose experience, concurrent problems such as hypoxia, and availability of alternative fuels.

* Manpower available for military service: 2, 047, 083 males age 16-49, 2, 047, 953 females age 16-49 ( 2008 estimate )

* Manpower fit for military service: 1, 303, 743 males age 16-49, 1, 332, 316 females age 16-49 ( 2008 estimate )

* Manpower reaching militarily significant age annually: 105, 655 males, 104, 376 females ( 2008 estimate )

Some veterinarians estimate that it occurs in up to 2 % of cats over the age of 10.

* Lanthanum-barium radiometric dating is used to estimate age of rocks and ores, though the technique has limited popularity.

The most massive stars have begun to evolve away from the main sequence and are becoming red giants ; the position of the turn-off from the main sequence can be used to estimate the age of the cluster.

This estimate happens to agree with current estimates on the age of Homo sapiens.

Radiocarbon dating ( usually referred to as simply carbon dating ) is a radiometric dating method that uses the naturally occurring radioisotope carbon-14 () to estimate the age of carbon-bearing materials up to about 58, 000 to 62, 000 years.

One of the most frequent uses of radiocarbon dating is to estimate the age of organic remains from archaeological sites.

When the sample is heated, at a certain temperature it will glow from the emission of electrons released from the defects, and this glow can be used to estimate the age of the sample to a threshold of approximately 15 percent of its true age.

An estimate of Holmes's age in the story " His Last Bow " places his birth in 1854 ; the story is set in August 1914 and he is described as being 60 years of age.

A 2004 estimate put military manpower availability ( males age 15-49 ) at 38, 347, with a " fit for military service " estimate of 20, 188.

The age estimates of the crater vary, with 4000 ± 1000 BCE being a commonly accepted estimate, though other estimates suggest the explosion was as recent as 660 ± 85 BCE ( Holocene ).

The most precise estimate of the universe's age is 13. 72 ± 0. 12 billion years old, based on observations of the cosmic microwave background radiation.

By counting the rings formed by the stack of smaller, older scutes on top of the larger, newer ones, it is possible to estimate the age of a turtle, if one knows how many scutes are produced in a year.

Current estimates as to the number of child laborers in the country range from the government's conservative estimate of 12 million children under 13 years of age to the much higher estimates of children's rights activists, which hover around 60 million.

As grazing animals, good dentition is essential to survival, and continued grazing creates specific patterns of wear, which can be used along with patterns of eruption to estimate the age of the horse.

these figures constitute the best estimate for the flux in interplanetary space near the Earth.

Hipparchus also gave an estimate of the distance of the Sun from the Earth, quoted by Pappus as equal to 490 Earth radii.

Most archaeologists estimate that the earliest settlers arrived in outrigger canoes from southern Borneo in successive waves throughout the period between 350 BCE and 550 CE, making Madagascar one of the last major landmasses on Earth to be settled by humans.

The distance from Earth to the subsolar magnetopause varies over time due to solar activity, but typical distances range from 6-15 R. Empirical models using real-time solar wind data can provide a real-time estimate of the magnetopause location.

For example, an order-of-magnitude estimate for a variable between about 3 billion and 30 billion ( such as the human population of the Earth ) is 10 billion.

According to a separate estimate by the United Nations, Earth ’ s population exceeded 7 billion in October 2011, a milestone that offers unprecedented challenges and opportunities to all of humanity, according to UNFPA, the United Nations Population Fund.

For example geochemical signatures from rocks may help to discover when life first arose on Earth, and analyses of carbon isotope ratios may help to identify climate changes and even to explain major transitions such as the Permian – Triassic extinction event .< ref name =" Twitchett "> A relatively recent discipline, molecular phylogenetics, often helps by using comparisons of different modern organisms ' DNA and RNA to re-construct evolutionary " family trees "; it has also been used to estimate the dates of important evolutionary developments, although this approach is controversial because of doubts about the reliability of the " molecular clock ".

) From the Earth, this bulge is being viewed from the direction of its pole, producing the overly large radius estimate.

One estimate is that less than 1 % of the species that have existed on Earth are extant.

* 280 BC – Aristarchus of Samos offers the first definite discussion of the possibility of a heliocentric cosmos, and uses the size of the Earth's shadow on the Moon to estimate that the Moon's radius is one-third that of the Earth, and to estimate sizes and distances for the Moon and Sun

The late Eugene Shoemaker of the U. S. Geological Survey came up with an estimate of the rate of Earth impacts, and suggested that an event about the size of the nuclear weapon that destroyed Hiroshima occurs about once a year.

* Aristarchus of Samos uses the size of the Earth's shadow on the Moon to estimate that the Moon's radius is one-third that of the Earth.

Assuming that the Earth is a uniform sphere ( which is not correct, but is close enough to get an order-of-magnitude estimate ) with M

which gives an estimate of radius based on the north-south curvature of the Earth.

The term radiative cooling is generally used for contemporary processes, though the same general principles apply to the cooling of the planet over geological time, which was first used by Kelvin to estimate the age of the Earth ( though you cannot neglect the fission heat source for this purpose, so his answer was wrong ).

The 50, 000-year estimate is at odds with the chronology given in Asimov's later novels, in particular Foundation and Earth and The Caves of Steel.

By 1931, Hubble had identified Messier 87 as a member of the Virgo cluster, for which he gave a provisional estimate of 1. 8 million parsecs from Earth.

There are several ways to estimate the value of Earth:

** As a variation, estimate the cost of a smaller habitat, such as Biosphere 2, and multiply its cost by the ratio between the population of Earth and of that smaller habitat.

If we additionally assume that the image plane is perpendicular to the ground plane ( an imaginary plane Tangential to the surface of the Earth ), and that the waterfall flows on a plane that is parallel to the image plane, we can estimate the height by measuring the vertical separation of waterfall head and base in

One experiment was to estimate the angular size of the Sun, as seen from the Earth.

Using this assessment, it is possible to estimate how much of the Earth ( or how many planet Earths ) it would take to support humanity if everybody followed a given lifestyle.