Boreal owls range over a much larger area than do other owls of similar size. The reason for this behavior is that the small mammals on which owls feed are especially scarce in the forests where boreal owls live, and the relative scarcity of prey requires the owls to range more extensively...

Twenty years ago, Balzania put in place regulations requiring operators of surface mines to pay for the reclamation of mined-out land. Since then, reclamation technology has not improved. Yet, the average reclamation cost for a surface coal mine being reclaimed today is only four dollars p...

The milk of many mammals contains cannabinoids, substances that are known to stimulate certain receptors in the brain. To investigate the function of cannabinoids, researchers injected newborn mice with a chemical that is known to block cannabinoides from reaching their receptors in the br...

Frobisher, a sixteenth-century English explorer, had soil samples from Canada’s Kodlunarn Island examined for gold content. Because high gold content was reported, Elizabeth I funded two mining expeditions. Neither expedition found any gold there. Modern analysis of the island’s soi...

TrueSave is a mail-order company that ships electronic products from its warehouses to customers worldwide. The company’s shipping manager is proposing that customer orders be packed with newer, more expensive packing materials that virtually eliminate damage during shipping. The manager...

The sequence ,,,...., of n integers is such that =k if k is odd and =-if k is even. Is the sum of the terms in the sequence&n...

Trying to mimic some of the pitch variations of a dolphin chattering is the same as attempting to sing like a sick parakeet when one is intoxicated: the complete lack of harmony and app...

Now generally regarded as a forgery, the Kensington Rune Stone, a 90-kilogram slab of inscribed rock discovered in Minnesota in 1898, was said to have recorded an encounter between Native Am...

 If x and y are positive integers, what is the value of xy ?  (1) The greatest common factor&nb...

In the xy-plane, region Rconsists of all the points (x,y) such that 2x + 3y <6. Is the point(r,s) in region R?(1) 3r + 2s = 6(2) r≤3 and s≤2 

For any positive integer x, the 2-height of x is defined to be the greatestnonnegative integer n such that  is a factor of x. If k and m are positive integers,is the 2-height of k great...

Does q have a distinct value?（1） （2） = 3

Despite the criticism in the early 1890's that if journalists use pictures the intellectual quality of publications would diminish, by the late 1890's photographs were found in ...

On a glacier in the High Himalayas, a Japanese zoologist has found a species of midge that is unlike any other known insect in its spending its entire life cycle in the snow and ice of ...

Last year the price per share of Stock X increased by k percent and the earnings per share of S...