Identify the center and radius of each circle. 1. x-12+(y+3)2=4 2. x-22+(y+1)2=16

Center: Center:

Radius: Radius:
ANSWER FAST PLS!

1. Centre = (1,-3); r = 2;  

2. Centre = (2,-1); r = 4  

Step-by-step explanation:

1. (x - 1)² + (y + 3)² = 4

The centre-radius equation for a circle is

(x - h)² + (y - k)² = r²

The centre of the circle is at (h, k) and the radius is r.

By comparing terms in the two equations we see that

h = 1, k = -3, r = 2

Centre = (1,-3); r = 2

2. (x - 2)² + (y + 1)² = 16

Here,

h = 2, k = -1, r = 4

Centre = (2,-1); r = 4

The figure below shows the first circle in red and the second in green.

 

The CD have earned $49.9 interest more than the savings account after 1 year. This problem can be solved assuming that both of the investment and the saving give an annual interest and then we can calculate each of the interest by multiplying the percentage and the principal amount (187.6 = 7%*$2680 and 137.7 = 4.5%*3060). The difference can be acquired by subtracting both of the interest amounts ( 49.9 = 187.6 - 137.7)