Answer:
The mass of the radioactive sample after 40 minutes is 12.8 g.
Step-by-step explanation:
The mass of the sample can be found by using the exponential decay equation:
Where:
N(t): is the amount of the sample at time t =?
N₀: is the initial quantity of the sample = 120 g
t = 40 min
λ: is the decay constant = 0.056 min⁻¹
Hence, the mass of the sample after 40 min is:
Therefore, the mass of the radioactive sample after 40 minutes is 12.8 g.
I hope it helps you!
Answer:
C. 1 2/3
Step-by-step explanation:
5 - 3 1/3
We can also convert 5 into a fraction with the same denominator like this:
Since we’re trying to make 5 a fraction with a denominator of 3, leave 4 as the whole number and 3/3 as the fraction
4 3/3
4 3/3 = 5 because 3/3 = 1 and 4 + 1 = 5
Now we can subtract!
4 3/3 - 3 1/3 = 1 2/3
Step 1. Subtract the whole numbers
Step 2. Subtract the numerator
Step 3. Leave the answer with the same denominator
Answer:
I'll setup the problem and you can compute the answer
Step-by-step explanation:
The formula for simple:
I = P*r*t
I = interest
P = loan amount
r = interest rate per period (period = days)
n = number of periods
P = 10,170
r = .0764/365
t = 272
2/x-9. You must divide 2 by x first to follow the order of operations then subtract by nine.
