


At

, you have

The trick to finding out the sign of this is to figure out between which multiples of

the value of

lies.
We know that

whenever

, and that

whenever

, where

.
We have

which is to say that

, an interval that is equivalent modulo

to the interval

.
So what we know is that

corresponds to the measure of an angle that lies in the third quadrant, where both cosine and sine are negative.
This means

, so

is decreasing when

.
Now, the second derivative has the value

Both

and

are negative, so we're essentially computing the sum of a negative number and a positive number. Given that

for

, and

for

, we can use a similar argument to establish in which half of the third quadrant the angle

lies. You'll find that the sine term is much larger, so that the second derivative is positive, which means

is concave up when

.
Answer:
110,567 mi²
Step-by-step explanation:
Ratio = 4 or 4/1
4/10 = x/80
so 4x times (10 times 80)
=
4x=800
divide both sides with 4
x=200
Answer:
250 packages if 3,000 packages are shipped
the ratio of the area of square KLMN to the area of LOK is 2a^2/b h
<h3>How to determine the ratio</h3>
From the image given, we can deduce the following;
- KLMN is a square
- LOK is a triangle
The formula for area of a square is
Area = a^2
Where, 'a' is the side
The formula for area of a triangle
Area = 1/ 2 base × height
Now, let's find the ratio
Ratio = area of KLMN/ area of LOK
Ratio = 
Ratio = 
make the expression linear
Ratio = 2a^2/bh
The ratio of the area of square KLMN to the area of LOK is 2a^2/bh
Thus, the ratio of the area of square KLMN to the area of LOK is 2a^2/b h
Learn more about area here:
brainly.com/question/25260313
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