The ODE is linear. Multiplying both sides by

allows you to condense the left hand side as the derivative of a product.


![\dfrac{\mathrm d}{\mathrm dt}\left[e^{7t}x\right]=5e^{7t}\cos2t](https://tex.z-dn.net/?f=%5Cdfrac%7B%5Cmathrm%20d%7D%7B%5Cmathrm%20dt%7D%5Cleft%5Be%5E%7B7t%7Dx%5Cright%5D%3D5e%5E%7B7t%7D%5Ccos2t)
Integrating both sides with respect to

yields

The integral can be done by parts. You should get


With the given initial condition, you have

So the particular solution to the ODE is
30 * 25 = 750
750/60 = 12.5
x = 12 hours and 30 minutes
Answer:
Step-by-step explanation:
x²+x²=9²
2x²=81
x²=81/2=(81×2)/4
x=9√2/2≈4.5√2≈6.36
9.
x²+x²=11²
2x²=11²
x²=11²/2
x=11/√2=11√2/2≈7.78
Answer:
1/4 of an inch
Step-by-step explanation:
Im not sure I follow your question, but the difference between the two is 1/4 of an inch.
1- 0.75=0.25
0.25=1/4