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• which is one purpose for providing additional resources at the end of an informational text? to persuade the reader of the author’s opinion on a topic to provide suggestions for sources unrelated to the topic to enrich content with suggestions for multimedia sources to limit the reading necessary for understanding the topic
  
• during a lab experiment, students are supposed to add small pieces of magnesium, aluminum, and calcium metal to concentrated hydrochloric acid in a test tube. the laboratory instructions include strong safety warnings to make sure that no sparks, open flames, or high heat sources are present in the room when students perform this experiment. which is the most likely reason for these warnings? hydrogen gas is highly flammable. heat may cause the hydrochloric acid to break down. heat can cause the acid to produce a salt.
  
• write a letter to the head of your school suggesting ways of improving discipline in your school
  
• which upton sinclair muckraking masterpiece is credited with spurring the passage of the pure food and drug act?
  
• a local department store estimates that 10 percent of its customers return the merchandise they purchase. let the random variable represent the number of returns for a random sample of 40 customers. assume that random variable follows a binomial distribution. what is described by the value of ? the mean of the random variable option a,the mean of the random variable the variance of the random variable option b,the variance of the random variable the standard deviation of the random variable option c,the standard deviation of the random variable the probability that 8 customers in the sample will return merchandise option d,the probability that 8 customers in the sample will return merchandise the probability of selecting a sample of 40 customers who will all return merchandise
  
• in lizzie bright and the buckminster boy,turner disagrees with the townspeople who want to remove everyone from malaga island because turner has never spoken to a black person before meeting lizzie. does not like the townspeople watching him all the time. wants his father to move his own family to malaga island. enjoys lizzie and his experience on malaga island.
  
• on a coordinate plane, a solid straight line has a positive slope and goes through (negative 4, 1) and (0, 3). everything below and to the right of the line is shaded. which linear inequality is represented by the graph? y ≤ 2x + 4 y ≤ one-halfx + 3 y ≥ one-halfx + 3 y ≥ 2x + 3
  
• which expression is equivalent to startfraction (5 a b) cubed over 30 a superscript negative 6 baseline b superscript negative 7 baseline endfraction? assume a not-equals 0, b not-equals 0.startfraction a superscript 7 baseline b superscript 10 baseline over 6 endfractionstartfraction 125 a superscript 18 baseline b superscript 21 baseline over 30 endfractionstartfraction 25 a cubed b superscript 4 baseline over 6 endfractionstartfraction 25 a superscript 9 baseline b superscript 10 baseline over 6 endfraction
  
• which applications, either for diagnostic purposes or for therapeutic purposes, involve radioactive materials placed in the body? check all that apply. radiopharmaceuticals mri laser eye surgery external beam radiation therapy lithotripsy brachytherapy radioisotope imaging
  
• which are the solutions of x2 = 19x + 1? startfraction 19 minus startroot 19 endroot over 2 endfraction comma startfraction 19 + startroot 19 endroot over 2 endfraction startfraction 19 minus startroot 365 endroot over 2 endfraction comma startfraction 19 + startroot 365 endroot over 2 endfraction startfraction negative 19 minus startroot 19 endroot over 2 endfraction comma startfraction negative 19 + startroot 19 endroot over 2 endfraction startfraction negative 19 minus startroot 365 endroot over 2 endfraction comma startfraction negative 19 + startroot 365 endroot over 2 endfraction