The answer is AAAAAAAAAAAAAAAA
A polar coordinate is that which can be written as (r, θ) where r is the radius and θ is the angle.
The radius, r, is also the hypotenuse of the right triangle that can be formed. Hence, it can be calculated through the equation,
r² = x² + y²
If we are to simplify this for the r alone, we have,
r = sqrt (x² + y²)
Substituting the known values,
r = sqrt ((4)² + (-4)²) = 4√2
The x and y can be related through the trigonometric function, tangent.
tan θ = y/x
To solve for θ
θ = tan⁻¹(y/x) = tan⁻¹(-4/4) = -45° = 315°
Hence, the polar coordinate is <em>(4√2, 315°)</em>
Answer:
D,x < 36 and x > 0, negative number cannot be in sq.root
Answer:
Step-by-step explanation:
We can see from the graph that 
can't be lesser than 
and extends unendlessly in the positive direction.
Answer:
55
Step-by-step explanation:
So for this you must find the unit rate at which the temperature drops in 1 hour as you are told it is constant. And so if it went down to 60 from 70 in 4 hours then 10/4= -2.5 degrees an hour. Then do 2.5 x 6 to give you that in 6 hours it shall drop 15 degrees which 70-15 gives you 55. Enjoy!
