It's 21 square units. If you map it on a complex plane (x-axis is real numbers, y-axis is imaginary numbers) you'll see that the sides of the rectangle is 3 and 7 which multiply to 21.
Answer:
Step-by-step explanation:
We want to find the equation of the circle: in general form.
We need to expand the parenthesis to obtain:
This implies that:
We add -9 to both sides of the equattion to get:
Simplify the constant terms to get:
The correct notation is: x ∈ [-1, 1]
She will have to pay 437.50 dollars did the math and it turned out to be the amount that you need
It is given in the question that, the swimming pool had 2.5 million liters of water in it. Some water evaporated, and then the pool only had 2 million liters of water in it.
So amount of water evaporated is
And percentage of water evaporated is
Therefore 20% of water evaporated .