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• use the equation for variance below, along with the given data set, to answer the following questions. sigma squared = startfraction (x 1 minus mu) squared + (x 2 minus mu) squared + ellipsis + (x n minus mu) squared over n endfraction what does the numerator evaluate to? what does the denominator evaluate to? the variance equals:
  
• why do buffer systems use either a weak acid or a weak base? weak acids and weak bases do not react easily. weak acids and weak bases are partially dissociated. weak acids and weak bases are unaffected by temperature. weak acids and weak bases are found in abundance on the earth.
  
• which of the following statements about the removal of southeastern tribes to the west are true?
  
• cell size maximizes the ability of diffusion and motor proteins to transport nutrients and waste products.
  
• how might the decision in mcculloch v. maryland make future supreme court decisions more complicated? the principle of federal supremacy meant the court would more often rule in favor of federal powers over those of individual states. the court could rule based on what it felt was right rather than basing its decisions on the constitution. the court could spend more time interpreting the intent of the constitution rather than simply following it to the letter. the principle of federal supremacy meant the court would have to determine new limits on the federal government’s power.
  
• why would ""intimidate soviets at the start of the cold war"" complete this diagram?
  
• select the correct answer. what is the y-intercept of f(x) = 3x+2? a. (9,0) b. (0,9) c. (0,-9) d. (9,-9)
  
• according to the keynesian framework, ________________________ may cause a recession, but not inflation.
  
• an object is launched into the air. the projectile motion of the object can be modeled using the function h(t) = –16t2 + 72t + 5, where t is the time in seconds since the launch and h(t) represents the height in feet of the object after t seconds. what is true about the projectile motion of this object? check all that apply. the initial height is 5 feet. the initial velocity of the object is –72 feet/second. the object will hit the ground after approximately 4.57 seconds. after 3 seconds, the object is 173 feet high. at t = 0, h(t) = 0.
  
• which of the following best describes the economic situation facing president bush when he was elected?