Round your answer to the nearest hundredth if needed
2 answers:
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Answer:
Part A) distance covered by the aligned red cells is: 180000 Km
Part B) 8000000 bacteria (8 million bacteria)
Step-by-step explanation:
Part A)
Let's first find the total number of red cells that the person has in the 5 liters, knowing that there are 4,500,000 of them in a cubic millimetre:
Since 1 liter contains 1,000,000 cubic millimetres, then, in 5 liters there must be 5 times that number of cubic millimetres. That is a total of 5,000,000 cubic millimetres.
Since in each cubic millimetre there are 4,500,000 red cells, then the number of red cells in the 5 liters must be the product of these two quantities:
4,500,000 x 5,000,000 = 22,500,000,000,000 red blood cells.
Now, to find the distance they will cover aligned one after the other, knowing that their average diameter is 0.008 mm is:
22,500,000,000,000 x 0.008 mm= 180000000000 mm
mm
In order to convert this distance into Km as requested, we use the fact that 1 mm = 0.000001 Km, or using exponents in base ten:
1 mm =
Then, the distance covered in kilometers is:
Part B)
The vaccine contains a total of bacteria per
In order to find how many bacteria we have in 80 of the vaccine, we first need to convert 80
into
:
Then, if in one there is
bacteria, in
there would be:
bacteria. That is:
bacteria = 8000000 bacteria (eight million bacteria)
Social Security numbers are of the form XYZ - MN - ABCD
Part A:
The first three digits XYZ are referred to as the area number
X is a number 1 - 7 (1, 2, 3, 4, 5, 6, 7)
That means we have 7 choices for X
Y and Z can be any number 0 - 9 (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)
That means we have 10 choices for Y and also 10 choices for Z
So, the number of possible ways are
But we know that the area code 666 has never been used.
So we need to subtract this one from the total.
Therefore, the total number of possible area codes is 699.