Lol what I don't understand what u are asking
1.8 x 10^13
Hope this helps.
Answer:

Step-by-step explanation:
Use the formula for a semicircle's perimeter.

Plug in 6 for d.

Let's use 3.14 for
, just to make it easier, but of course, if it states to round it to something else, just plug in that many values for
.

Answer:
278°
Step-by-step explanation:
m arc BAC = 360 -(2×41)
= 360 - 82 = 278°