1 year ago

Heparin is available in a vial labeled 20,000u/ml. how many ml are required for a 12,500u dose?

1 answer:

5 0

To get the amount of ml required for 12500u, we proceed as follows:
amount ml required to form 20000u is 1 ml, thus amount of ml required for 12500u will be:
12500/20000
=0.625 ml
Answer:
0.625 ml

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How many distinct 9-letter words starting with “i” can be formed from the word “committee”?

Nikitich [7]

We have already chosen "i" to be the first letter. This means that we still have 8 letters that we can use as the second letter. Once that letter is chosen, we still have 7 letters that we can use as the third letter, and so on. This means we have

$8 \times 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1 = 8!$

ways of choosing the remaining 8 letters.

However, some of the 8 available letters are equal: we have 2 m's, 2 t's and 2 e's. This means that we overcounted the number of words on the reasoning above. We can correct the counting by dividing three times by 2!, one time for each of the repeated letters.

The final answer is

$\dfrac{8!}{2! \times 2! \times 2!} = \dfrac{40320}{8} = 5040.$