Question

Can someone help me in math? Thank you

Answer 1

The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass. Starting with 155 grams of a radioactive isotope, how much will be left after 6 half-lives?

Answer 2

Round your answer to the nearest gram.

Answer 3

Using the half life formula:
Nn=No(1/2)n, where Nn = quantity remaining after n half-lifes, and No = initial quantity

Nn=(150)(1/2)6 = 150(1/64) = 2.34g

Answer 4

Damn im far off lol

Answer 5

the above answer is not correct because the initial amount is 155 not 150g

Answer 6

I got 20...

Answer 7

initial amount is 155, t/h would be 6 since you have 6 half lives

so A = 155(1/2)^6 = ?

Answer 8

._.

Answer 9

you just need to plug it into a calculator.

Answer 10

1/2^6 goes first right?

Answer 11

(1/2)^6, yes, parentheses are important here

Answer 12

0.015625

Answer 13

yup then just multiply that by 155

Answer 14

Now I multiply that by 155?

Answer 15

Oh alright :)

Answer 16

2.421875

Answer 17

awesome, since we were given 155 which has 3 significant figures we round that to 3 sig figs getting 2.42g = your answer

Answer 18

...

Answer 19

You totally lost me in the "sig figs"... your explanation went Chinese at that point ._.

Answer 20

if you haven't learned about significant figures yet don't worry about it

Answer 21

I believe the answer is 20? correct

Answer 22

@Vocaloid

Answer 23

Hey sexy lady -points at Voca & Sup-

Answer 24

Opa Opa Opa Gangname style c;'

Answer 25

...

Answer 26

where are you getting 20? we established that the answer was 2.42g

Answer 27

Im a guy bruh

Answer 28

~(._.~)

Answer 29

Please don't derail the topic

Answer 30

^^^

Answer 31

(~._.)~
~(._.)~
K, i'm done

Answer 32

Well...

Answer 33

Because I put 20 as the answer and it said it was right...

Answer 34

¯\_(ツ)_/¯ Math nowadays... never to be understood by humanity
Mental
Abuse
To
Humans

Answer 35

she ignored it lmao

Answer 36

Oh don't worry Voca... I know you are very smart ^.^ just sometimes these dumb systems don't even know the answers and expect humans to know it

Answer 37

lol

Answer 38

Welp off to my next question

Answer 39

#SemperFi