a radioactive substance has a Decay rate of 5% per hour. if 500 hundred grams are present initially, how much of the substance r
1 answer:
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Answer:
Therefore values of a and b are
Step-by-step explanation:
Rewrite in the form
where a and b are integers,
To Find:
a = ?
b = ?
Solution:
..............Given
Which can be written as
Adding half coefficient of X square on both the side we get
...................( 1 )
By identity we have (A - B)² =A² - 2AB + B²
Therefore,
Substituting in equation 1 we get
Which is in the form of
On comparing we get
a = 3 and b = 2
Therefore values of a and b are
25% is equal to 
. To get 25% of 300, we multiply 300 by either 0.25 or . This gives us 