Tesserae of semiprecious stones were set into the plaster at an angle in order to a. fit into a particular space. c. reflect light better. b. create an imperfection. d. keep them from being stolen.

c. reflect light better.

Explanation:

We are talking of mosaics that were made by teams of artisans created on plaster. It was common to use semi-precious stones that could be carefully placed by an artisan so that they would better reflect the light, if slanted a bit by design, some of the tiny mosaic semi-precious stones would catch and reflect light.

254.34

step-by-step explanation:

the formula for area of a circle is given by

a = pi * r^2

a = pi * 9^2

a = 81*pi

using 3.14 as an approximation for pi

a = 3.14*81

a = 254.34

well it definitly does because if you are seen as weak you will be seen as unimportant and they will walk all over you and the us is the most powerful military and the largest in the world

hope this