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• why is it important that the human trachea is reinforced with cartilaginous rings
  
• a community pool that is shaped like a regular pentagon needs a new cover for the winter months. the radius of the pool is 20.10 ft. the pool is 23.62 ft on each side. to the nearest square foot, what is the area of the pool that needs to be covered? 192 ft2 960 ft2 1,921 ft2 3,842 ft2
  
• what was one important result of formerly enslaved people writing personal narratives? their stories influenced the abolitionist movement. their stories helped other enslaved people learn how to read. their stories inspired the songs that workers sang in the fields. their stories allowed enslaved people to maintain african traditions.
  
• which of the following people was not involved in the making of stained glass windows? a. glassblower b. painter c. artisan d. all of the above were involved
  
• water is made of two hydrogen atoms and one oxygen atom bonded together. julia is describing how water undergoes a physical change when it boils. she says that the particles shift to be farther apart and that the oxygen and hydrogen separate. she also says that the total mass of the steam is the same as the initial water, and that heat energy was required to cause the change. she finishes her description by saying that the steam can be turned back into water if it is cooled. which is the mistake in her description?
  
• what was the initial result of the presidential election in 2000? there was a clear winner. a third-party candidate won. it was close and controversial. it was close, but not controversial.
  
• what might happen to the organisms in the food web below if the number of phytoplankton and vegetation drastically decreased? a food web titled chesapeake bay waterbird food web. it shows a very complex food web with many different food chains of various species displayed in 5 categories: producers, herbivores, primary consumers, secondary consumers, tertiary consumers. the small fish and wading birds would be affected. only the small fish would be affected. the small fish, bivalves, and invertebrates would be affected. the entire food web would be affected.
  
• read the excerpt from chapter 8 of the travels of marco polo.here again good incense grows in profusion—i will tell you how. it is produced by trees of no great size, like little fir trees. they are gashed with knives in various places, and out of these gashes oozes the incense. some of it even oozes from the tree itself without any gashing, in consequence of the great heat that prevails.what is most likely the author's purpose for including this detail about dhofar?to convince readers of the benefits of using incense from dhofar to entertain readers with tales of buying incenseto educate readers about how incense is made in dhofarto give readers instructions on how to make their own incense
  
• the tax rate as a percent, r, charged on an item can be determined using the formula startfraction c over p endfraction minus 1 equals r. – 1 = r, where c is the final cost of the item and p is the price of the item before tax. louise rewrites the equation to solve for the final cost of the item: c = p(1 + ). what is the final cost of a $40 item after an 8% tax is applied? $
  
• what are the x- and y-coordinates of point c, which partitions the directed line segment from a to b into the ratio 5:8? round to the nearest tenth, if necessary. (–2.2, –6.3) (–2.4, –6.4) (2.7, –0.7) (1.2, –4.7)