Answer: First one is B second one just make it
Step-by-step explanation:
Answer:
4/15
Step-by-step explanation:

Consider the bottom most rectangle.
Its length = 5 - 2 = 3 units
Its width = 3 - 1 = 2 units
So, its area = 3(2) = 6 square units.
Consider the middle rectangle.
Its length = 2 - 1 = 1 unit
Its width = 4 - 2 = 2 units
So, its area = 1(2) = 2 square units.
Finally, consider the top rectangle.
Its length = 6 - 1 = 5 units
Its width = 6 - 4 = 2 units
Its area = 5(2) = 10 square units.
Hence, total area = 6 + 2 + 10 = 18 square units. Correct option is C.
Polar and cartesian equation<h2>Initial explanation</h2>
Let's analyze the relation between r and x and y:
We have that between the indicated value of r (of the polar coordinates) and x and y (of the cartesian coordinates) there is a relation because they form a triangle. If r changes, then the value of x and y will change.
<h2>STEP 1: given equation</h2>
Using the given equation
r = 2 secØ
we have that

<h2>STEP 2: secØ equation</h2>
Observing the image of the initial explanation we have a right triangle, we know that the equation of
secØ for any right triangle is given by:

In this case,
hypotenuse = r
adjacent side = x
then,

<h2>STEP 3: comparison between given equation and secØ equation</h2>
Then, we have that:

This means that:

Then,
x = 2
The equation in cartesian coordinates is x=2.
Answer: x=2