The exact number is 121.966019, so if you round to the nearest whole number, the answer is 122.
Since the TOTAL area is 30 square inches, what you would do is divide 30/3, since you already know how wide it is. And the answer is 10. The envelope is 10 inches tall.
The correct answer to your problem will be B
Answer:

Step-by-step explanation:
The standard form of an equation of a circle:

(h, k) - center
r - radius
The general form of an equation of a circle:

We have the center (-2, 1). Substitute to the equation in the standard form:

Put thr coordinates of the point (-4, 1) to the equation and calculate a radius:

Therefore we have the equation:

Convert to the general form.
Use 

Answer:
x = -3
Step-by-step explanation:
Hope it helps you!