Virginia starts with 200 milligrams of a radioactive substance. the amount of the substance decreases by 25% each week for a number of weeks, w. the expression 200(1−0.25)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a: it is the product of the initial amount and the decay factor after w weeks. b: it is the difference between the initial amount and the percent decrease. c: it is the difference between the initial amount and the decay factor after w weeks. d: it is the initial amount raised to the decay factor after w weeks.

It is the product of the initial amount and the decay factor after weeks.

Step-by-step explanation:

im, ttm

 option 'A' is correct.

Step-by-step explanation:

Since we have given that

Quantity of radioactive substance = 200 milligrams

Rate of decay = 25%

Number of weeks = w

As we know the formula for "Compound Interest ":

So, here , P=200 milligrams i.e. the initial amount

So, It is the product of the initial amount and the decay factor after w weeks.

Hence, option 'A' is correct.

180

step-by-step explanation:

3. (5x + 1) - (-10x + 6)

simplify the answer choice. combine like terms. remember to distribute the negative to the terms inside the second parenthesis. also remember that two negatives = one positive, and one of each sign = negative.

- (-10x + 6) = + 10x - 6

simplify. combine like terms:

5x + 1 + 10x - 6

5x + 10x + 1 - 6

15x - 5

∴ it is your answer

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