Answer: x-intercept is -9
Step-by-step explanation: To find the x intercept y is 0 and to find the y intercept x is 0. 18 divided by -2 is -9, which is the answer
F-1(x) = x\5 + 6/5
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Considering the function for the remaining amount of cesium in the atmosphere, F(x) = 1000×0.5^(x/30), we have;
First part:
- The area will be safe again in about 100 years time.
Second part;
- The y-intercept is at the start of the measurement
Third part;
- The function is a decay function
<h3>Which method can be used to evaluate the given function?</h3>
First part;
The given function for the remaining amount of cesium is presented as follows;

When 100 kg. of cesium is remaining, we have;

Which gives;


- Therefore, the area will be safe again in approximately 100 years.
Second part;
The y-intercept is given by the point where <em>x </em>= 0
At the y-intercept, we therefore have;

At the y-intercept, the amount of cesium remaining, F(x) is 1,000, which is the initial amount of cesium.
- The y-intercept is therefore, at the start of the measurement, where 1000 kg. is present in the atmosphere.
Third part;
The amount of cesium remaining F (x) decreases as the time, <em>x</em>, increases, the function is therefore a decay function.
Learn more about exponential functions here;
brainly.com/question/2456547
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0909 becaue jdnjasccnmds enscdbjsdn
Answer:
Lana is 15 and Susan is 30
Step-by-step explanation:
let Lana's age=x
Susan's age=2x
Their ages four years ago:
Lana=x-4
Susan=2x-4
Now their ages 4years ago was 37 so:
x-4+2x-4=37
3x-8=37
3x=37+8
3x=45
x=15
Since Lana's age is x,she is 15years
Since Susan's age is 2x,she is 30years