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• a person is interested in becoming an electrician. what are some appropriate types of preparation that this individual can consider? (select all that apply.)
  
• what is the value of the discriminant, b2 − 4ac, for the quadratic equation 0 = x2 − 4x + 5, and what does it mean about the number of real solutions the equation has? the discriminant is −4, so the equation has 2 real solutions. the discriminant is −4, so the equation has no real solutions. the discriminant is 35, so the equation has 2 real solutions. the discriminant is 35, so the equation has no real solutions.
  
• an education budget went from $800,000 to $900,000. what is the approximate percent increase?
  
• what's the name of the black hole region that creates the gravitational force
  
• a class has $90 to spend on a field trip. the field trip costs $2.50 per person and there will be 5 chaperones on the trip. one student used the inequality 90 greater-than 2.50 (x + 5) to find x, the number of students that the field trip budget could accommodate. which best describes the error in the student’s inequality? the expression representing the cost should be 2.50 (5 x). the expression representing the cost should be 2.50 (x + 5 x). the inequality symbol should be greater-than-or-equal-to instead of > since up to and including $90 may be spent. the inequality symbol should be less-than-or-equal-to instead of > since less than or equal to $90 may be spent.
  
• what is the primary function of the upper respiratory system? to move air toward the lungs while warming, moistening, and filtering it to diffuse oxygen and carbon dioxide in and out of cells to absorb and break down nutrients after they are consumed to pad the head with air pockets to protect against brain trauma
  
• a consumer charges a $46.92 purchase on a credit card. the card has a daily interest rate of 0.039%. if the consumer pays off the balance at the end of 30 days, how much in interest will be paid for the purchase?
  
• what type of bond will result if the atoms below combine? the electronegativity of each atom is given.
  
• there are more hydrogen atoms in living organisms than any other atom, but oxygen is more abundant in terms of mass. why is this statement true? hydrogen is a gas, but oxygen is a solid. hydrogen atoms have a lower mass than oxygen atoms. hydrogen atoms make up more of water's mass than oxygen atoms. hydrogen is present as single atoms and oxygen is bonded in compounds.
  
• modern mathematical systems spread outward from india via conquest migration religious missionaries. trade routes.