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lara [203]
4 years ago
7

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
Mathematics
2 answers:
Viktor [21]4 years ago
7 0

Answer:

poop

Step-by-step explanation:

poop

MrRissso [65]4 years ago
6 0
The correct answer is Choice A.

This is an example of an exponential equation, so we need the formula y=ab^x.

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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The digits base is 7 then we should convert them into base 6.

The exponent or power to which a base must be raised to yield a given number. Expressed mathematically, x is the logarithm of n to the base b if bx = n, in which case one writes x = logbn.

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5 0
2 years ago
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Answer x=6 and y=10

Explanation:

Replace each variable in turn with 0 and solve

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5x+3y=30 Put zero in place of y and solve for x

5x+3(0)=30

\frac{5x}{5} =\frac{30}{5}

x=6  The x-intercept is 6

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3 years ago
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Step-by-step explanation:

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