Answer:
D
Step-by-step explanation:
The radius r is the distance from the centre to a point on the circle.
Calculate r using the distance formula
r = √ (x₂ - x₁ )² + (y₂ - y₁ )²
with (x₁, y₁ ) = (0, 0) and (x₂, y₂ ) = (- 5, - 12)
r =
=
=
=
= 13 → D
IT IS C BECAUSE IT IS SAYING IT WAS 43 AND IS NOW DROPPING BY -3
4x^2+12x+7x
4x^2+19x
Was it meant to equal something or are you just simplifying the equation?
Answer:
7.2*10^3.
7,200 in scientific notation, is 7.2*10^3