Answer: m=
1
3
√2 or m=
−1
3
√2
Step-by-step explanation:
The formula of an area of a circle:

We have
r = 1.8 m
π ≈ 3.14
Substitute:

X would equal 60 degrees because the degree of the top left area is equal to the degree of the bottom right. So the equation would be x+20=80 so you would solve to get x=60
Answer:
Step-by-step explanation:
The different isotopes have different "half-lives" – the time it takes to lose half of its radioactivity. Pu-239 has a half-life of 24,100 years and Pu-241's half-life is 14.4 years. Substances with shorter half-lives decay more quickly than those with longer half-lives, so they emit more energetic radioactivity.
Answer:
Average speed = <em>7</em><em> </em><em>metre</em><em> </em><em>per</em><em> </em><em>second</em>
Step-by-step explanation:
Average speed ( v ) = distance / time
=》v = 350 / 50
=》v = 7
so, average speed = 7 m / sec