Step-by-step explanation:
first find two numbers u multiply to get 7 and add to get 8: (1×7)=7,(1+7)=8
so in the first bracket u put (x +1) n in the other (x+7)
ans: (x+1)(x+7)
Answer:
16.07 milligrams
Step-by-step explanation:
From the question,
Using the formula of radioactive decay,
R/R' = 2ᵃ/ᵇ..................... Equation 1
Where R = Original mass of the polonium-210, R' = Final mass of polonium-210 after decaying, a = Total disintegration time, b = half life of polonium-210.
Make R' the subject of the equation
R' = R/(2ᵃ/ᵇ)................ Equation 2
Given: R = 100 milligrams, a = 1 years = 365 days, b = 138.39 days
Substitute these values into equation 2
R' = 100/(2³⁶⁵⁰⁰/¹³⁸³⁹)
R' = 100/(6.222)
R' = 16.07 milligrams of plonium-210
Answer:
-43,-44
Step-by-step explanation:
let the integers be n,n+1
n+n+1=-87
2n=-88
n=-88/2=-44
n+1=-44+1=-43
