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.

5x+10 is the correct one

hope this

if a = 1,   and b = 2, then the answer is 47.99999999. if you round that to the nearest whole number, the answer is 48.