Staals half
1 gram left
0.3 grams left
half lives are normally written in years
it goes likt this

A=final amount
P=initila amount
t=time elapsed
h=time half life is (same units as time)
let's use days as the units of time
we are given
initial amount=1gram
final amount=0.3gram
time=4 days
so

solve for h

take the ln of both sides


times both sides by h

divide both sides by ln(0.3)

use calculator
h=2.30287
3 sig figs
h=2.303 days
X/750=4
multiply both sides by 750
x=3000
the number is 3000
Answer:
Hello! Mizuki here to help
The correct answer would be B
Step-by-step explanation:
Number of people who didn't get flu and weren't vaccinated:115
a = prt
a = 24,000 x 0.06 x(48 / 12)(you have to turn months into years)
a = 24,000 x 0.06 x 4
a = $5,760
The payment due is $5,760