Nicole got a prepaid debit card with $25 on it. For her first purchase with the card, she bought some bulk ribbon at a craft sto
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Hey there!
- <em>With negatives (
) you have to switch your symbol to the other way</em>
- Firstly, substitute the
as an invisible 1
- So, now we have to flip the equation around
- We have to
by
on each of your sides
Good luck on your assignment and enjoy your day!
~
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Step-by-step explanation:
From the statement:
M: is total to be memorized
A(t): the amount memorized.
The key issue is translate this statement as equation "rate at which a subject is memorized is assumed to be proportional to the amount that is left to be memorized"
memorizing rate is .
the amount that is left to be memorized can be expressed as the total minus the amount memorized, that is .
So we can write
And that would be the differential equation for A(t).