In this equation C means the total. In order to find the total you must add the two class together to get the total. The equation that represents this would be the fourth one. 65 + 176 = C
With reduction of order, we assume a solution of the form

, with

. Then


and substituting into the ODE gives



Let

, so that

. This gives the linear ODE

This equation is also separable, so you can write

Integrating both sides with respect to

gives


Next, solve

for

by integrating both sides again with respect to

.



And finally, solve for

.

and note that

is already taken into account as part of

, so this is the general solution to the ODE.
Answer:
2.09<2.1
Step-by-step explanation:
2.09 < 2.1
Take one number and subtract the other.
If you get a positive, then the first number is larger. If you get a negative, then the second number is larger.
I think 2.1 is larger
2.1
-2.09
-------------
Borrow from the 1
2. 0 10
-2. 0 9
---------------
0. 0 1
Since this is positive, 2.1 is larger
The answer is 1
thank me later