Differentiate the given solution:

Substitute
and
into the ODE:

and it's easy to see the left side indeed reduces to 0.
8.5 feet(12 inches per foot)= 102 inches total
There are 102 inches in 8.5 feet
Answer: B
Step-by-step explanation:
Answer:

Step-by-step explanation:
There is a formula that can be used to find the x-value of the vertex of the parabola. This formula is 
We have the function 
From this function, we can find that

We can plug in our know values into the formula to get

Then we can plug in our x-value to find the y-value of the vertex

This means that the vertex would be 
Answer:
11/12 inch
Step-by-step explanation:
That'd be 11/12 inch per month for 12 months.