B=7
3(b-4)+5b=44
3b-12+5b=44
8b=44+12
8b=56
b=7
ANSWER
The greatest common factor is 5b.
EXPLANATION
The first expression can be rewritten as

The second expression is rewritten as

The third expression is

The greatest common factor is the product of the least powers of the common factors.
Answer:
The surface area of a sphere is calculated by formula:
A = 4 x pi x radius^2
=> radius = sqrt(A/(4 x pi) = sqrt(4534.16/(4 x pi)) = 19 (cm)
Hope this helps!
:)
Answer:
20,000 particles
Step-by-step explanation:
Here we are given that the amount if radioactive particles has come down to 40,000 from 80,000 in 80 years . Hence by the definition of Half Life,the half life of the item is 80 years.
Now we are asked to guess the number of radioactive particles after 80 years. As we already know that , the half life of material is 80 years , the number of radioactive particles will be reduced to its half in 80 years. Hence the number of radioactive particles after 80 years is 20,000