Which is an example of a structural adaptation for a mouse?

a.
a mouse evades detection by predators by lying very still.

b.
a mouse is active at night so that predators have a harder time seeing it.

c.
a mouse forages for food close to its nest.

d.
a mouse has long whiskers that are used to detect temperature changes.

Part 1) The diameter is

Part 2) The radius is

Part 3)  The length of an arc is equal to

Step-by-step explanation:

Part 1) Find the diameter

we know that the circumference of a circle is equal to

where

D is the diameter

we have

assume

substitute and solve for D

Part 2) Find the radius

we know that

The radius is half the diameter

so

substitute

Part 3) Find the length of an arc of 190 degrees

we know that

The circumference of the circle subtends a central angle of 360 degrees

so

using proportion