Answer:
dA/dt = k1(M-A) - k2(A)
Step-by-step explanation:
If M denote the total amount of the subject and A is the amount memorized, the amount that is left to be memorized is (M-A)
Then, we can write the sentence "the rate at which a subject is memorized is assumed to be proportional to the amount that is left to be memorized" as:
Rate Memorized = k1(M-A)
Where k1 is the constant of proportionality for the rate at which material is memorized.
At the same way, we can write the sentence: "the rate at which material is forgotten is proportional to the amount memorized" as:
Rate forgotten = k2(A)
Where k2 is the constant of proportionality for the rate at which material is forgotten.
Finally, the differential equation for the amount A(t) is equal to:
dA/dt = Rate Memorized - Rate Forgotten
dA/dt = k1(M-A) - k2(A)
Answer:
20
Step-by-step explanation:
80% of 25 is 20, even if you put it into a calculator
Answer:
x value: start with 0 and go up by 1
y value:start with 10 and each week is 5 more than previous week
Step-by-step explanation:
Answer:
It should be C
Step-by-step explanation:
B is a quadratic function and A is a linear line.
Answer:
14
Step-by-step explanation:
they = to the same thing
