Answer:
Step-by-step explanation:
Just stop taking 40 dollars out of the bank every week
Answer:

Step-by-step explanation:
Let,
Now, us simplify the given differential equation and write it in terms of D,

or, 
or, 
We have our auxiliary equation:

or, 
or, 
Therefore our solution is,

and, 
Applying the boundary conditions, we get,


Solving them gives us,

Hence,

Answer:
[see below]
Step-by-step explanation:
The equation is in the form:
y = kx
Where k is the constant of proportionality.
Since 1/4 is in k's spot, the constant of proportionality should be '1/4'.
Hope this helps.
Answer:
(5h-4t)(5h+4t)
Step-by-step explanation:
25h² - 16t²
adding and subtracting 20ht from it (√25 and √16 = 5x4 = 20):
25h² + 20ht - 20ht -16t²
factor:
(5h-4t)(5h+4t)