Iodine-131 is a radioactive material with half-life of eight days. A scientist starts with 100 grams of iodinie- 131. Which func
tion can be used to estimate the number of grams of iodine-131 remaining at the end of x days?
A. f(x)= 100(0.92)^x
B. f(x)= 100 (1.09)^x
C. f(x)= (0.92)^x
D. f(x)= (1.090^x
2 answers:
Answer:
poop
Step-by-step explanation:
poop
The correct answer is Choice A.
This is an example of an exponential equation, so we need the formula
.
The a value is the starting value of 100. The b value must be a decimal lower than 1 because it is decreases.
If you substitute in 8 for x, you will see that the output is about 50 (half of 100).
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