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:
multiply them all and you will get the answer. use calculator
I got you sis :)
3+y/4=-y/8
Multiply thru by 8 to get:
24 + 2y = -y
3y = -24
y = -8
Answer: 28 creo
Step-by-step explanation:
Cuando usted está tratando de encontrar el perímetro de un cuadrado o una forma diferente, se multiplica. 7 x 4 = 28 o 4 x 7 = 28
Espero que esto ayude.
