D or C.
Think?
look On this website for more info
https://en.wikipedia.org/wiki/First_100_days_of_Franklin_D._Roosevelt%27s_presidency
The decay equation is of the form

where
m(t) = the mass remaining after t minutes
m₀ = the initial mass
k = constant
Because the half-life is 3 minutes, therefore

Therefore
-3k = ln(0.5)
k = ln(0.5)/(-3) = 0.231
Because m₀ = 16 mg, the time, t, for the mass to decay to 1.0 mg is given by

Answer: 22 min (nearest integer)
Answer:
Being the senator from Wisconsin and while delivering an oration to Pro-republic women’s group in West Virginia, Joseph McCarthy claimed that he owned a list of individuals who were communists and they worked in various state departments.
That was a lie as he had not possessed such a list and he was charged for this wrong doing. The senate passed a vote of censure against him. It was done in order to impair the reputations and created anxieties regarding the spread of communism.
He claimed a list of communists who were working in various state departments and this instigated investigations. It created Red scare among the people of America as they started to become apprehensive that communism is going to get spread in America.