1.) 376.2
2.) 37620
3.)376200.
3.) 3762000
hope that helped
Answer:

Step-by-step explanation:
a = 1
d = 2

Addition
A. X=12
B. S=10
C. Y=34
D. T=12
Subtraction
A. X=8
B. S=2
C. Y=14
D. T=6
<h3>
How to identify the source and range of the signal?</h3>
Remember that a circle of radius R, centered at the point (a, b) is described by the equation:

In this case, we have the equation:

First, notice that 49 = 7², so we can rewrite:

Then, comparing this with the general circle equation, we can see that the center is at (5, -2) and the radius is R = 7.
Then the source is at (5, -2) and the range is 7 units.
If you want to learn more about circles:
brainly.com/question/1559324
#SPJ1