Question

Write an equation.
The half-life of Rhodium, Rh-106 is about 30 seconds, you start with 500 grams

Answer 1

Please can someone help? I just got out of the hospital and this is homework that I missed.

Answer 2

I just can't figure out the equation on the new meds I'm on:(

Answer 3

First of all, we'd have to figure out how much Rhodium we lose every second.

Answer 4

we lose 50% rhodium every second which means that it is not linear

Answer 5

What is 500 divided 30?

Answer 6

it wouldn't be 500/30. it would be 500/2 and then 250/2 and then 125/2 and so on

Answer 7

wouldn't it?

Answer 8

I just need to answer it in y=m(x)+b format

Answer 9

No, if you want to determine, on average, the amount of RH lost in 30 secs, you'd have to first find how much you lose each second.
For that matter, you divide the total mass with the total amount of time.

Answer 10

why would I need the average? I need to graph it so it is non linear curve. Ive already graphed it just need to get the equation for it.

Answer 11

why aren't you answering?

Answer 12

Because we need to establish a proportion that will allow us to create the "slope" of the line that will compose that graph you wrote.

Answer 13

ok, well 500/30 is 16.666

Answer 14

Good.
So, if we were to write a function, we would write that multiplied "x" that represents the amount of second that has passed:
\[f(x)=500-(16.666)x\]
if we call "f(x)" as "y", we will obtain:
\[y=500-(16.666)x\]