
Divide both sides by
:
![x\dfrac{\mathrm dy}{\mathrm dx}+y=\dfrac{\mathrm d}{\mathrm dx}[xy]=-\dfrac{\sec(xy)}{x^3}](https://tex.z-dn.net/?f=x%5Cdfrac%7B%5Cmathrm%20dy%7D%7B%5Cmathrm%20dx%7D%2By%3D%5Cdfrac%7B%5Cmathrm%20d%7D%7B%5Cmathrm%20dx%7D%5Bxy%5D%3D-%5Cdfrac%7B%5Csec%28xy%29%7D%7Bx%5E3%7D)
Integrate both sides to get

where
and
are constants, and divide by
to solve for
:

An exact solution (not in terms of a definite integral, anyway) doesn't seem likely...
As much as u can think of and I am going to name some; 2 dimes, 20 pennies, 4 nickel, 2 dimes and 2 nickel and more
Answer:
Rate of Interest is 
Step-by-step explanation:
Given that

and T=0.5 years
To find rate of interest
We have I=PRT
Therefore




Therefore 
Rate of Interest is 
Answer: $115 a month
Step-by-step explanation: