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• nina studies an artificial heart model. the model has tubes that supply an electric current to the model. nina switches on the current that provides an impulse to the heart. she observes that the heart contracts and relaxes. compare this model with that of a human heart, and place the steps describing how blood flows through the human heart in order. signal transferred to the ventricles the atria contract electrical signal travels toward the heart the ventricles contract signal by the nodes in the atrium signal received by the atrioventricular node
  
• select the correct answer. why did the warsaw pact dissolve in 1991? a. the cold war had ended, so the soviet union and the united states no longer needed to manufacture nuclear weapons. b. the soviet union had fallen, so it no longer needed to govern its federated states. c. the berlin wall had been brought down, so the pact would no longer keep germany divided. d. the countries of the communist bloc had separated from the soviet union, so they no longer took part in the pact. e. the cold war had ended, so the united states and its allies were no longer dependent on one another for military aid.
  
• john notices jimmy taking $5 from the cash register at the end of the night. jimmy says that the company owes him for making him work three friday nights in a row. jimmy also asks john not to tell anyone. john’s ethical duty is to ______. a. stay loyal to jimmy and not turn him in b. forget the incident because it doesn’t involve him c. ask jimmy for half the money not to tell d. turn jimmy in despite his protests please select the best answer from the choices provided a b c d
  
• which polynomial can be simplified to a difference of squares? 10a2 + 3a – 3a – 16 16a2 – 4a + 4a – 1 25a2 + 6a – 6a + 36 24a2 – 9a + 9a + 4
  
• which details from the narration show that rainsford is an experienced hunter and outdoor enthusiast? select 3 options.but what kind of men, he wondered, in so forbidding a place.an unbroken front of snarled and ragged jungle fringed the shore.some wounded thing, by the evidence a large animal, had thrashed about in the underbrush;the jungle weeds were crushed down and the moss was lacerated; one patch of weeds was stained crimsona small, glittering object not far away caught rainsford's eye and he picked it up. it was an empty cartridge.
  
• what does it mean to say that money is divisible? there is a limited supply of money available. money is easy to carry from place to place. larger denominations of coins and bills can be exchanged for smaller denominations. money is accepted as a way to make a payment anywhere in the us.
  
• which type of text ridicules something in order to expose or correct it? allegory fable myth satire
  
• which word contains a prefix that means between? a forerunner b microscope c decompose d internet
  
• select the correct answer from each drop-down menu. amélie runs a bakery. she wants to find out whether her cake sales are affected by the weather conditions. she recorded the daily temperature and the number of cakes she sold on different days of the year. the table shows the data she gathered. daily temperature (°f) cakes sold 42 39 45 52 48 31 54 61 59 72 62 35 64 61 65 34 67 58 75 45 84 24 the correlation coefficient is close to . based on this information, we can conclude that amélie's cake sales are affected by the daily temperature.
  
• what significance does the painting above have? a. the figures are three of the most prominent female artists of the time. b. this painting was the first painting by a female to be displayed. c. it helped counter the restrictions placed on women artists.