anonymous
  • anonymous
hi, How you would answer this; "A syringe to be used for drawing a sample of blood has a diameter of 20mm and a length of 5cm. Calculate the volume of blood in the syringe in mm3 when the syringe is full." I got 1.57*10^-5 mm but the options given are all In *10^3 mm. Help please
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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amistre64
  • amistre64
convert all measurement to read the same.. cm ->mm or the other way around; then use the formula for the volume of a cylnder: V = pi(r^2)h where r = half the diameter, and h= the length of the needle.
anonymous
  • anonymous
Yes, I did that and come to the answer 1.57*10^-5 mm3 However, the choices given are: a 1.57 x 10^3 mm3 b 6.28 x 10^3 mm3 c 15.7 x 10^3 mm3 d 62.8 x 10^3 mm3
amistre64
  • amistre64
50mm = 5 cm? is that right? pi(10^2)(50)?

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amistre64
  • amistre64
15707 mm^3 is what I get, move the decimal "3" places to get the other jargon... 15.7 x10^3
anonymous
  • anonymous
Oh thanks. Cos I changed them into meters then converted them Must have converted it wrong
amistre64
  • amistre64
always remember, the exponent of the "10" tells you how many decimal places to move..... and meters? wow.... :)
anonymous
  • anonymous
XD .. I know lol. I have a few other problems, do I make a new post or post it here?
amistre64
  • amistre64
new post seems better, more people can see it then..
anonymous
  • anonymous
ok thanks again

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