Answer:
Step-by-step explanation:
lets say you have two negative numbers, -x and -y (x and y are positive).
The mass of substance left after 7 days is 13.09 g
The mass of substance left, N is given by
N = N₀exp(-λt) where λ = decay constant and N₀ = initial mass of substance present = 24 g and t = time
Also, λ = 0.693/t' where t' = half-life of iodine = 8 days
So, λ = 0.693/t'
λ = 0.693/8
λ = 0.086625/day
Since the mass of substance left is N = N₀exp(-λt) and we require the mass of substance after t = 7 days,
N = N₀exp(-λt)
N = 24 gexp(-0.086625/day × 7 days)
N = 24 gexp(-0.606375)
N = 24 g × 0.5453
N = 13.09 g
So, the mass of substance left after 7 days is 13.09 g
Learn more about radioactive decay here:
brainly.com/question/23705307
Answer: 150 cups
Step-by-step explanation:
Vivian used 25 cups of shampoo every day.
To find out the amount used in 6 days therefore, you should multiply 25 by the number of days which is 6:
= Number of days * Number of cups used per day
= 6 * 25
= 150 cups
We know -48 came from (a)(-6), the "L" in "FOIL".
If -48 = -6a, then a = 8.
Now with a=8, go ahead and FOIL (x+8)(x-6) to find m.
Answer:
3^-1 > 1/4
Step-by-step explanation:
3^-1 = 1/3
1/4 = 1/4
1/3 = 0.3333
1/4 = 0.25
0.3333>0.25
3^-1 > 1/4
