Questions asked by Ellie

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• What is the relationship between buoyancy and density?
  
• How much metal is needed to cast a cubical metal box with outer side 10 inches long if the thickness of its walls should be exactly 2 inches?
  
• # ((a^2+ax+x^2)/(ax+2ay)) ÷( (a^3−x^3)/(bx+2by))# ?
  
• A tourist calculated that if he walks to the railroad station with a speed of 4 mph, he’ll miss the train by half an hour, but if he walks with a speed of 5 mph, he’ll reach the station 6 minutes before the departure of the train ?
  
• Does this paragraph need any changes and are there any errors?
  
• Does this make sense? The discovery of DNA has helped in the accurate safeguarding of the law system.
  
• A glass vase is in the shape of a cylinder with a cone shaped opening. The height of the cylinder is 33 cm and the diameter is 20 cm. How much glass is needed to make the vase?
  
• #sqrt(25y^2+40y+16) =5y+4# Solve the equation?
  
• Find the values of a and b that make the following expression an identity? #(5x+31)/((x−5)(x+2) )= (a)/(x−5) − (b)/(x+2)#
  
• Find k if (#x^3+6x^2+kx+12#) is divisible by (#(x+4)#)?
  
• How do you factor #(b−c)^3+(c−a)^3+(a−b)^3#?
  
• How do you solve #3x+243=39#?
  
• Without DNA, humans wouldn’t exist. Is it wouldn't or won't?
  
• Two cars left the city for a suburb, 120 km away, at the same time. The speed of one of the cars was 20 km/hour greater than the speed of the other, and that is why it arrived at the suburb 1 hour before the other car. What is the speed of both cars.?
  
• How do you express #((y^2-xy)/(x^2+xy)-xy+y^2)(x/(x-y))+(y/(x+y))# as a single fraction?
  
• How many chromosomes do Maple trees have (both number of pairs and in total)?
  
• A patient's blood smear is shown in the picture. The patient has also shown symptoms of sickle cell anemia. What are the abnormalities in this picture?