Answer:
176.71
Step-by-step explanation:
you can just search up "area of circle calculator and plug in the radius
Convert
to exponential/polar/trigonometric form:



By DeMoivre's theorem,


so that
and
.
Answer:
<h2>The circumference is multipled by 4.</h2>
Step-by-step explanation:
The formula of an area of a circle"

The formula of a circumference of a circle:

The area multipled by 16:

The radius has increased fourfold, therefore:

The circumference is multipled by 4.
You can calculate the area and check the circumference:

Calculate the radius:
<em>divide both sides by π</em>

Calculate the circumference of both circles:



No . but she can buy 2 of the books but not all 3