A,81 because if you try checking 81 will be the only composite number im in 6 grade.....
(a) If

is the mass (in mg) remaining after

years, then


(b)

(c)
The answer is 7.
the Brainliest please!!
Check the picture below.
the segment LOJ is a diameter, and therefore the arcLCJ made by that diameter will have a central angle of 180°.
that simply means that the arcLC is 180 - 94, or 86°.
the ∡LJC is an inscribed angle that is intercepting the arcLC, and therefore, by the inscribed angle theorem, it'll be half of arcLC.
(104+137+154+131+x) / 5 = 130
The calculation part I would like to leave it for you. It's a good practice.