Question

a culture started with 6000 bacteria. after 6hrs, it grew to 7200 bacteria. predict how many bacteria will present in 17 hrs.

does anybody know the answer its my last question.. /:

Answer 1

It grew 1200 bacteria in 6 hours.

This means 200 an hour.

Answer 2

thats the answer

Answer 3

No, calculate it for 17 hours and add the 6000 from the beginning.

Answer 4

No, the answer is\[7200 + 200\cdot17\]

Answer 5

10600 is the answer?0:

Answer 6

Actually, I think it's already 6 hours in. so you just add 12 hours? I find this question could have been better explained to avoid any errors.

Answer 7

AHhhh never mind youère right.

Answer 8

@ParthKohli , no it isn't.

Answer 9

17 hours from there, sorry.

Answer 10

Right, that could be a case as well.\[6000 + 200\cdot 17\]

Answer 11

But it says will present in 17 hours.

Answer 12

wait.... dang so confusing.

Answer 13

yepp,

Answer 14

The answer is one of the following:\[1) \quad 6000 + 200\cdot 17\]\[2) \quad 7200 + 200\cdot 17\]

Answer 15

\[B(t)=B_02^{t/{T}}\]

Answer 16

I'd write both honestly. On a test there would never be such a question anyways.

Answer 17

so much fail.

Answer 18

@dom_14 u have options/choices ?

Answer 19

no its just type in the answer , and if i get it wrong then i fail.

Answer 20

Wow...

Answer 21

@UnkleRhaukus i think its simple math question with linear growth rate.
so in 17 hours it will be 6000+200*17 =9400

Answer 22

Most likely.

Answer 23

\[B(t)=B_02^{t/{T}}\]

\[7200=6000\cdot2^{6/{T}}\]

\[\frac{7200}{6000}=2^{6/T}\]

\[\log_2\left(\frac{7200}{6000}\right)=6/T\]

\[T=\frac{6}{\log_2\left(\frac{7200}{6000}\right)}\]

Answer 24

Bactria grow exponentially

Answer 25

find T the doubling time ,
then substitute into the first equation

Answer 26

does it make sense @dom_14 ?

Answer 27

thanks guys.

Answer 28

@dom_14
did you pass? don't leave us hanging in suspense...

Answer 29

no i needed 8 to pass and i only got 7 right.. darn.

Answer 30

It was pretty hard.

Answer 31

I want to do that test :/

Answer 32

yeah, it is. like im so tired of taking it and no you dnt, it switches up questions.

Answer 33

What's it called?

Answer 34

you'll have to update your FB status I guess :(

Answer 35

plato.