Answer:
The required position of the particle at time t is: 
Step-by-step explanation:
Consider the provided matrix.



The general solution of the equation 

Substitute the respective values we get:


Substitute initial condition 

Reduce matrix to reduced row echelon form.

Therefore, 
Thus, the general solution of the equation 


The required position of the particle at time t is: 
Answer:
The bill is $1837.5
Step-by-step explanation:
Given


--- The variation
T = 35; when B = 210
Required
Find B when T = 40

Express as an equation

Make k the subject

<em>T = 35; when B = 210</em>


When T = 40, we have:


Make B the subject


If you are referencing a picture, there is none attached to this post. If you can repost with a picture I can try to help you!
50$ to start account in the bank if that what you needed