The time it takes for 1g of strontium-90 to decay to 250 mg is; 57.6 years
<h3>What is the half life of an element?</h3>
The formula for half life is;
A(t) = A₀ * (¹/₂)^(t/t_1/2)
Where;
A(t) is amount left after t years
A₀ the initial quantity of the substance that will undergo decay;
t_1/2 is the half-life of the decaying quantity.
We are given;
t_1/2 = 28.8 years
A₀ = 1 g
A(t) = 250 mg = 0.25 g
Thus;
0.25 = 1 * (¹/₂)^(t/28.8)
log 0.25 = (t/28.8) log (1/2)
-0.60206 = (t/28.8) * -0.3010
t = 2 * 28.8
t = 57.6 years
Read more about half life at; brainly.com/question/11152793
An example of the benefit of telehealth form the above options is "Doctors are able to use high-quality cameras to better diagnose patients during telehealth." (Option C)
<h3>What is Telehealth?</h3>
Telehealth is the delivery of health-related services and information via the use of electronic information and telecommunications technology.
It enables long-distance interaction between patients and clinicians, as well as care, guidance, reminders, education, intervention, monitoring, and remote admissions.
<h3>What are the benefits of Telehealth?</h3>
Using technology to offer health care has various benefits, including:
- cost savings
- convenience, and
- the potential to give treatment to persons with mobility issues or those living in remote locations who may not have access to a local doctor or clinic.
Learn more about Telehealth:
brainly.com/question/759368
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Hi
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They are : electric, solar, wind, and geothermal.</span>
<u>Answer:</u>
Option D. It's important to recognise children when they follow the rules because not doing so can cause them to act out to receive adult attention.
<u>Explanation:</u>
Every human being regardless of his age, expects validation and acceptance from the surrounding in which he lives, children aren’t an exception from the list.
It is most important to recognise the actions of the children when they follow the rules as doing so would encourage them to do the same action when they encounter the same situation in the future and helps in increasing the child’s self image, self esteem and emerging as a self regulating child.
In the case of not recognising the actions would lead to a situation where the children would start breaking the rules, just in order to grab your attention and this would continue in a cyclic manner if it is not treated effectively by the adults which will eventually lead to behavioural problems.
Hence the right answer is, Option D.
