Answer:
<h2>The standard form: x² + (y + 1)² = 25</h2><h2>The general form: x² + y² + 2y - 24 = 0</h2>
Step-by-step explanation:
The equation of a circle:

(h, k) - center
r - radius
We have the center (0, -1) and the radius r = 5 <em>(look at the picture)</em>.
Substitute:

<em>use (a + b)² = a² + 2ab + b²</em>
<em>subtract 25 from both sides</em>

2πr/2r = <span>π This is the ratio of the Circumference : Diameter </span>
Answer:
Step-by-step explanation:
Given the expression

solving the expression

combine the fractions i.e 

add similar elements i.e 
Thus,
B=kt
constant is k
b=0.25t
constant of proprtionality is 0.25