Question: No definite relation exists between the annual rings of growth and the amount of sapwood. Within the same species the cross-sectional area of the sapwood is very roughly proportional to the size of the crown of the tree. If the rings are narrow, more of them are required than where they are wide. As the tree gets larger, the sapwood must necessarily become thinner or increase materially in volume. Sapwood is thicker in the upper portion of the trunk of a tree than near the base, because the age and the diameter of the upper sections are less.
Is there an answer to this question: Are more rings necessary if they're narrow or wide?

Answer: narrow

Question: On April 19, 1995, the Alfred P. Murrah Federal Building was destroyed by a fertilizer bomb manufactured and detonated by Timothy McVeigh. The blast and catastrophic collapse killed 168 people and injured over 680. The blast shockwave destroyed or damaged 324 buildings within a 340-meter radius, destroyed or burned 86 cars, and shattered glass in 258 nearby buildings, causing at least an estimated $652 million worth of damage. The main suspect- Timothy McVeigh, was executed by lethal injection on June 11, 2001. It was the deadliest single domestic terrorist attack in US history, prior to 9/11.
Is there an answer to this question: How many people were killed in the bombing?

Answer: 168

Question: About 98% of Antarctica is covered by the Antarctic ice sheet, a sheet of ice averaging at least 1.6 km (1.0 mi) thick. The continent has about 90% of the world's ice (and thereby about 70% of the world's fresh water). If all of this ice were melted, sea levels would rise about 60 m (200 ft). In most of the interior of the continent, precipitation is very low, down to 20 mm (0.8 in) per year; in a few "blue ice" areas precipitation is lower than mass loss by sublimation and so the local mass balance is negative. In the dry valleys, the same effect occurs over a rock base, leading to a desiccated landscape.
Is there an answer to this question: What does Antarctica have 98% of for the world?

Answer: unanswerable

Question: During the First World War, Paris sometimes found itself on the front line; 600 to 1,000 Paris taxis played a small but highly important symbolic role in transporting 6,000 soldiers to the front line at the First Battle of the Marne. The city was also bombed by Zeppelins and shelled by German long-range guns. In the years after the war, known as Les Annees Folles, Paris continued to be a mecca for writers, musicians and artists from around the world, including Ernest Hemingway, Igor Stravinsky, James Joyce, Josephine Baker, Sidney Bechet and the surrealist Salvador Dali.
Is there an answer to this question: How many soldiers did Parisian Taxis transport to the front line at the First Battle of the Marne?

Answer:
6,000