Find the angle measures of a triangle if the first angle is thirty-one degrees more than the second, and the third is five degre
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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
Firstly, we will draw diagram
we will draw line qq'
which will make mqq'n as parallelogram
and we know that opposite sides of parallelograms are always equal
so, we get
we are given
mq=42
so,
we can see that q' lies on np
so, we can write as
we are given
np=112
so, we can plug these values
now, we can see that
triangle qpq' forms isosceles triangle
so, we get
so,
............Answer
