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• a binary star system is made of stars, one of which is brighter than the other. astronomers are able to detect the dimmer star because its gravity causes the bright star to . astronomers can also spot the dimmer star by observing a phenomenon called a(n) binary. this happens when the dim star passes in front of the bright star.
  
• a 0.500 l bottle of water contains 8.82 × 10–7 ml of benzene. what is the concentration of benzene in ppmv? ppmv
  
• sam has a cylindrical storage container 7 inches tall with a radius of 5 inches. how many cubic inches of cat litter will fit in the container? express your answer in terms of π .
  
• what is the solution to the linear equation? x – startfraction 2 over 3 endfraction x minus startfraction one-half endfraction equals startfraction 1 over 3 endfraction plus startfraction 5 over 6 endfraction x. = + x x = –5 x = –negative startfraction 1 over 6 endfraction x = startfraction 1 over 6 endfraction x = 5
  
• what is the best definition of the term hawks? people who take part in violent anti-war protests people who call for u.s. military intervention abroad people who believe the president should have more power to wage war people who fight in u.s. military conflicts in southeast asia
  
• decide whether the sentence is grammatically correct or incorrect as written. ¿tienen algunos computadoras en la clase? correct incorrect
  
• read the excerpt from ronald reagan's ""tear down this wall"" speech. while we pursue these arms reductions, i pledge to you that we will maintain the capacity to deter soviet aggression at any level at which it might occur. and in cooperation with many of our allies, the united states is pursuing the strategic defense initiative—research to base deterrence not on the threat of offensive retaliation, but on defenses that truly defend; on systems, in short, that will not target populations, but shield them. by these means we seek to increase the safety of europe and all the world. which type of appeal is used in this part of the speech? an emotional appeal an ethical appeal an expert appeal a logical appeal
  
• how many of the original thirteen states must ratify or approve the constitution for it to take effect?
  
• you borrow $1300 to buy a telescope. what is the monthly payment? a picture shows a telescope with a note. the note reads, “11.8 percent simple interest equal monthly payments for 2 years.”
  
• study the image. which phrase describes this plate boundary? does not occur in oceans may form rift valleys is a type of convergent boundary is a region where earthquakes occur