)A class has 9 boys and 15 girls. What is the ratio in simplest form that compares number of boys to total number of students?
2 answers:
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6j+
n=134
you multiply this by 18
6j+18n=558
6j+1/3*n=134
___________(-)
53n/3=424 => 53n=1272 => n=24
You put n in the first equation:
6j+8=134
6j=126 => j=21
Final answer: Nathan has 24 books and Jason 21.
6j+18n=558
6j+1/3*n=134
___________(-)
53n/3=424 => 53n=1272 => n=24
You put n in the first equation:
6j+8=134
6j=126 => j=21
Final answer: Nathan has 24 books and Jason 21.
Remember that the general decay equation is:
where
is the amount after a time 
is the initial amount
is the the decay percent in decimal form
The first ting we are going to do is find by dividing our <span>decay rate of 25% by 100%: </span>
.
We also know from our problem that
. Lets replace and in our formula:
We know now that our decay rate is 0.75, and since 0.75<1, we can conclude that this situation represents exponential decay.
Now, to find the initial amount, we are going to solve our equation for
:
Notice that will depend on the number of ours . <span />
where
The first ting we are going to do is find
We also know from our problem that
We know now that our decay rate is 0.75, and since 0.75<1, we can conclude that this situation represents exponential decay.
Now, to find the initial amount, we are going to solve our equation for
Notice that