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• a 0.500 l bottle of water contains 8.82 × 10–7 ml of benzene. what is the concentration of benzene in ppmv? ppmv
  
• what does the underlined word mean in the following sentence? usamos el teclado para escribir. keyboard internet copier screen
  
• in what year did the western roman empire collapse? 370 ce 455 ce 476 ce 1453 ce
  
• hal is asked to write an exponential function to represent the value of a $10,000 investment decreasing at 2% annually. what multiplicative rate of change should hal use in his function? 0.02 0.98 1.02 1.98
  
• read the excerpt from ""what the black man wants."" i am for the ""immediate, unconditional, and universal"" enfranchisement of the black man, in every state in the union. [loud applause.] without this, his liberty is a mockery; without this, you might as well almost retain the old name of slavery for his condition; for in fact, if he is not the slave of the individual master, he is the slave of society, and holds his liberty as a privilege, not as a right. he is at the mercy of the mob, and has no means of protecting himself. how does the repetition of the phrase “without this” support the paragraph’s argument?
  
• which sentence best uses a split infinitive to clearly emphasize the message of safe driving? before getting behind the wheel, young drivers must remember not to text. young drivers must remember to narrow their focus fully when they get behind the wheel. young drivers must remember to always turn off cell phones before getting behind the wheel. when driving a car, young drivers need to most importantly remember to completely ignore their phones.
  
• solve the system of equations by substitution. x + y = a system of equations. startfraction 3 over 8 endfraction x plus startfraction one-third endfraction y equals startfractions 17 over 24 endfraction. x + 7y = 8 ( , )
  
• which is one way that a short-term environmental change will most likely affect organisms within an ecosystem?
  
• which statement describes how the van allen belts are formed? when low-energy particles from the sun bounce off earth’s magnetic field when high-energy particles from the sun bounce off earth’s magnetic field when low-energy particles from the sun are trapped by earth’s magnetic field when high-energy particles from the sun are trapped by earth’s magnetic field
  
• during one month of cell phone use, noah used 200 anytime minutes and 400 text messages, and paid $80.00. the next month, he used 150 anytime minutes and 350 text messages, and paid $67.50. which statement is true? each text message costs 5 cents more than each anytime minute. each anytime minute costs 10 cents more than each text message. a text message and an anytime minute each cost 25 cents. each text message costs double the amount of an anytime minute.