Y=400-10d
If he reads 10 pages a day and there is 400 total pages then you plug in an amount of days (d) to find the total amount of days it takes him to read the book.
The solution of the given logarithmic equation is x = 28.1
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How to solve the logarithmic equation?</h3>
Here we have the logarithmic equation:
4*ln(x - 8) = 12
And we want to solve this for x.
Remember the relations:

First, we divide both sides by 4:

Then, if we apply the exponential equation to both sides of our equation, we get:

If you want to learn more about logarithmic equations:
brainly.com/question/236421
#SPJ1
18.) The area of one of the triangles would be half of the area of the parallelogram, because the two triangles are congruent.
20.) The formula for the area of a parallelogram is:
A = b • h
110.5 = 13h
110.5 / 13 = 8.5
110.5 = 13 • 8.5
And because this is a measurement of the height, not the area, it is just meters (m)
So, the full answer is 8.5 m
I hope this helps!
The answer is 8.
3 times 2 times 8 equals 48.
I think the answer is 0.062 because if you write down 0.064 and start moving down until the first number, you should have 0.062.