Answer:
900 times
Step-by-step explanation:
A doctor takes a sample of Laura's blood. There are 
red blood cells and 5000 white blood cells.
Now, we are asked to get how many times more red blood cells are there than white blood cells in the sample.
There were = 4500000 red blood cells in the sample.
Hence, 
And there are 900 times more red blood cells than white blood cells in the sample. (Answer)
The scientific notation is <span>4.21 x 10/<span>8
hope this helped</span></span>
we know that
a) 
gallon is equal to 
quarter of gallon
so
by proportion
gallons is equal to
quarter of gallon
b) liter is equal to 
quarter of gallon
by proportion
quarter of gallon is equal to
liters
therefore
the answer is the option
Answer:
The time it'd take for the element to have 15 g of mass is approximately 68 min.
Step-by-step explanation:
The radioactive decay of a substance is given by the following formula:
Since the element has a half life of 12 minutes, this means that after this time the mass of the element will be half of it was originally, therefore:
Therefore the mass of the element is given by:
If the initial mass is 760 g and the final mass is 15 g, we have:
The time it'd take for the element to have 15 g of mass is approximately 68 min.Step-by-step explanation:
