15 × 60 = 900
900 × 22 = 19800
The answer is 19800 screws
Answer:
105
Step-by-step explanation:
PEMDAS
Radioactive half-life is the time it takes for half an amount of radioactive material to decay into something else. In this case, it is assumed that the decay product is not radioactive or otherwise hazardous.
We must use the radioactive decay formula to determine at what time the radiation reaches a safe level.
A = Ao[e^(-0.693)(t)(t 1/2) where t 1/2 is the half-life, t is elapsed time, Ao is the original quantity, A is the future quantity.
We are given a half-life of 2.4 days , an Ao of 1.25 and an A of 1.00:
1.00 = (1.25)e^(-0.693)(2.4)t
1.00/1.25 = e^(-1.6632)t
0.8 = e^(-1.6632)t
t = 0.135 days = 3 hrs 15 min
This is the amount of time to a "safe level" using only radioactive decay, not venting or other means.
The estimated sum of the given numbers close to the value of a single number is 3500.
<h3>What is the clustering estimation technique?</h3>
The cluster estimation technique is an approach that is applied to evaluate the aggregate sum and products when the numbers that are added or multiplied cluster close in value to a single number.
It implies that, for the given set of data, we will find the average first.
i.e.
= (709+645+798+704+658)/5
= 3514/5
= 702.8
Using the clustering technique, the estimated sum of numbers close to the value of a single number is:
= 700 × 5
= 3,500
Learn more about the clustering estimation technique here:
brainly.com/question/3428511
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The Answer is 53 if i did the math correct
