ariana starts with 100 milligram of a radioactive substance the amount of the substance decreases by 20% each week each number f

Question

4 years ago

10

or weeks w. the expression 100 (-0.2) finds the amount radioactive substance remaining w weeks.

2 answers:

Anuta_ua [19.1K] · Answer 1 · 2021-11-11T05:34:02+03:00

The required expression is 100 - 0.2w

Step-by-step explanation:

Given,

Amount of radioactive substance = 100 mg

The substance decreases by 20% each week.

To find the remaining amount of the in w weeks.

Now,

Each week 20% = 0.2 of the substance will be decreased.

So, in w weeks 0.2×w of the the substance will be decreased.

Hence,

The remaining substance = 100 - 0.2w

dexar [7] · Answer 2 · 2021-11-11T07:05:39+03:00

dexar [7]4 years ago

6 0

Answer:

It is the difference between the initial amount and the percent decrease.

Step-by-step explanation:

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