Questions asked by Dorian

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• Let the function f be defined as f(x)=5x^2-7(4x+3). What is the value of f(3)?
  
• Why cannot this length be determined?
  
• The avg of a list of 4 numbers is 90. A new list of 4 numbers has the same first 3 numbers as the original list, but the fourth number in the original list is 80, and the fourth number in the new list is 96. What is the avg of this new list of numbers?
  
• The number 1,001 is the product of the prime numbers 7, 11, and 13. Knowing this, what is the prime factorization of 30,030?
  
• 40 inches is what percent of 28 inches?