Answer:
23 years
Step-by-step explanation:
Step 1: Calculate the rate constant (k) for the radioactive decay
A radioactive substance with initial concentration [A]₀ decays to 97% of its initial amount, that is, [A] = 0.97 [A]₀, after t = 1 year. Considering first-order kinetics, we can calculate the rate constant using the following expression.
ln [A]/[A]₀ = - k.t
k = ln [A]/[A]₀ / -t
k = ln 0.97 [A]₀/[A]₀ / -1 year
k = 0.03 year⁻¹
Step 2: Calculate the half-life of the substance
We will use the following expression.
= ln2/ k = ln 2 / 0.03 year⁻¹ = 23 years
Answer:
$320.34
Step-by-step explanation:
$53.39x6=$320.34.
<u><em>Could I please have BRAINLIEST.</em></u>
Answer:
9.25
Step-by-step explanation:
It's pretty simple all you have to do is 83.25 divided by 9.
Answer: x < 3
Step-by-step explanation:
Let's solve your inequality step-by-step.
7x−9<12
Step 1: Add 9 to both sides.
7x−9+9<12+9 =7x<21
Step 2: Divide both sides by 7.
7x/7 < 21/7
Answer: x < 3
Answer:
7.92, 7.94, 7.999, 8.061, 8.1, 8.087
Step-by-step explanation:
There isn't exactly a step by step explanation.
7.92 is smallest because while all the ones with 7 in it have a 9 in the first digit, the second digit is the smallest out of those. you can work your way up from there
