2t−5=−10 what is t I really need help
2 answers:
t = -2.5 or 
Here's how we find that out:
2t -5 = -10..........................We need to get the variable, t, by itself
2t = -5................................Add 5 to both sides
t = -2.5...............................Divide both sides by 2
So, your answer is
0r -2.5
I hope this helped! Have a great day! :))
Here's how we find that out:
2t -5 = -10..........................We need to get the variable, t, by itself
2t = -5................................Add 5 to both sides
t = -2.5...............................Divide both sides by 2
So, your answer is
I hope this helped! Have a great day! :))
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The mass of cesium left afer 120 years if the original mass of cesium is 8640 with an half-life of 30 years, is 540 grams.
<h3>What is half-life?</h3>This can be defined as the time taken for half the amount of a radioactive substance to decay.
To calculate the amount of cesium left after 120 years, we use the formua below.
Formula:
- R' = R/(
)............. Equation 1
Where:
- R = Original amount of Cesium
- R' = New amount of cesium
- T = Total time
- t = Half-life
From the question,
Given:
- R = 8640
- T = 120 years
- t = 30 years
Substitute these values into equation 1
- R' = 8640/(
)
- R' = 8640/
- R' = 8640/16
- R' = 540 grams.
Hence, The mass of cesium left afer 120 years is 540 grams.
Learn more about half-life here: brainly.com/question/25750315