5x +3y -3 you just add 2 and 5 for x and you can put a 1 in front of the single y so 1+2 is 3 for the y value and then you can just subtract the 3
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
2^x = 32
x = 5
Hope this helps!
Answer=15
She went to Kroger and bought food for $36.00
a turkey that cost( $1.50 per pound)
If she spent( $58.50) how many pounds was the turkey
How we got our answer was easy, first we figured she spunt 36.00 on everything else
Then we see she pays 1.50 per pound of turkey
Now we have to subtract 36 from 58.50 to figure out how much the turkey was.
We got 22.50, now we divide this by 1.50 to get our answer.
When we did that we got 15
Hope this helps!