Answer: There will be 0.04 grams will be left in the sample after 20 years.
Step-by-step explanation:
Since we have given that
Here, Initial amount of radioactive substance = 400 grams
We need to find the amount of substance that will be left in the sample after 20 years.
So, t = 20 years
So, it becomes,
Hence, there will be 0.04 grams will be left in the sample after 20 years.
What's the problem you want to ask
The probability that you lose all five times will be 0.59.
<h3>How to calculate the probability?</h3>
From the information given, the chances of winning are 0.1. Therefore, the chance of losing will be:
= 1 - 0.1 = 0.9
Therefore, the probability that you lose all five times will be:
= 0.9 × 0.9 × 0.9 × 0.9 × 0.9
= 0.59
Learn more about probability on:
brainly.com/question/24756209
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10 minutes : 8 problems
x minutes : 60 problems
10 * 60/8 = 150/2 = 75 minutes for 60 problems
Answer:
y is going back by 3's x is going back one
Step-by-step explanation:
