A scientist begins with 100 milligrams of a radioactive substance that decays exponentially. After 36 hours, 50 mg of the substance remains. How many milligrams will remain after 52 hours ?

It is easy to calculate the half-life as 36 hours.

Looking at the graphic, we see that we will need the bottom formula

Ending Amount = Beginning Amount / 2^n

Where "n" is the number of half-lives which = 52 hours / 36 hours = 1.4444444 half-lives.

Ending Amount = 100 mg / 2^1.444444444

Ending Amount = 100 / 2.71258

Ending Amount = 36.74336230689

or rounding that off, it's about 36.743 milligrams

Step-by-step explanation:

spinning a 1, 2, or 3. option d.

step-by-step explanation: when spinning a number graph up to 4, and aiming for any number less than 3, that automatically eliminates the number 4. now you have two numbers to spin on that are less than 3, but the number 3 is included in this question because it's no greater of an number than itself. i hope this you : )

step-by-step explanation:

1