Friday

April 18, 2014

April 18, 2014

Number of results: 855

**genetics/biology**

Bacteria Y has a mutation within it’s genome, at gene R, that provides resistance to neomycin. Bacteria Z is sensitive to neomycin, however, when Bacteria Y is placed in a mixture with Bacteria Z, Bacteria Z also gains neomycin resistance. One cell of Bacterium Y undergoes ...
*Friday, November 7, 2008 at 1:20am by bebe*

**genetics/biology**

Bacteria Y has a mutation within it’s genome, at gene R, that provides resistance to neomycin. Bacteria Z is sensitive to neomycin, however, when Bacteria Y is placed in a mixture with Bacteria Z, Bacteria Z also gains neomycin resistance. One cell of Bacterium Y undergoes ...
*Friday, November 7, 2008 at 11:00am by bebe*

**tofu**

does tofu have any naturally occuring bacteria in it? When I incubated the tofu juice, a white bacteria grew, but I can't find any information stating what it might be. It should not have an "natural" bacteria in it. Bacteria are not used in the production process. Tofu is an ...
*Friday, December 1, 2006 at 6:05pm by Christine*

**Algebra**

In a lab experiement, there is a culture that contains 25 bacteria at 2:00. At 2:15 there are 50 bacteria, At 3:15 there are 800 bacteria. What is the conjecture about the rate at which the bacteria increase?
*Wednesday, October 3, 2012 at 10:13pm by Carol*

**Math**

In a lab experiment, the count of a bacteria doubles every hour. a)at 1pm, there was 23000 bacteria. How many bacteria will be present at midnight? I can't seem to get the correct answer. The answer is 47 104 000 bacteria. Thanks very much in advance!
*Wednesday, January 23, 2013 at 7:25pm by A Canadian*

**precalculus**

A bacteria culture initially contains 1500 bacteria and doubles every half hour. a) Find an expression for the number of bacteria after t hours. Q(t)= b) The number of bacteria after 20 minutes is (the answer must be an integer) c) The number of bacteria after 9 hours is
*Wednesday, March 2, 2011 at 1:18pm by josh*

**math**

Bladder infections are often caused when the bacteria E. coli reach the human bladder. Suppose that 3000 of the bacteria are present at time t = 0. Then t minutes later, the number of bacteria present will be a) How many bacteria will be present after 10 minutes? 30 minutes? ...
*Monday, March 24, 2014 at 3:18pm by Emmanuel*

**Science**

Which of the following is NOT true of bacteria? a. Bacteria change the sugar in milk to lactic acid. b. Bacteria change nitrogen into a form plants can use. c. Bacteria change harmful chemicals into harmless ones. d. Bacteria change oxygen into nitrogen.
*Friday, February 1, 2013 at 7:20pm by T.J And the Vibe*

**Calculus**

A colony of bacteria is grown under ideal conditions in a laboratory so that the population increases exponentially with time. At the end of 2 hours, there are 4,800 bacteria. At the end of 4 hours, there are 19,00 bacteria. How many bacteria were present initially?
*Thursday, January 3, 2013 at 3:24pm by Oj*

**MATH :)**

3. In Biology, it is found that the bacteria in a certain culture double every half-hour. If the initial number of bacteria in culture is 1000, A. Find the defining equation for the number N of bacteria in culture after T hours, assuming that no bacteria die. B. How many ...
*Wednesday, May 4, 2011 at 1:34pm by NEED ANSWER URGENT. ANON.*

**math**

A type of bacteria reproduces by splitting in two every thirty minutes. How many bacteria will there be after 4 hours if there are 2 bacteria to begin with?
*Wednesday, November 3, 2010 at 6:15pm by Kam*

**Math**

A culture of bacteria in a petri dish is doubling every hour. If there are 100 bacteria at time t=0, how many bacteria will there be in 12 hours?
*Sunday, November 7, 2010 at 1:37am by Anonymous*

**math**

A type of bacteria reproduces by splitting in two every thirty minutes. How many bacteria will there be after 4 hours if there are 2 bacteria to begin with?
*Thursday, January 10, 2013 at 6:36pm by Nicholas*

**Science**

A vaccine can protect you against a disease because it (1)destroys toxic substances from bacteria before they can make you sick\ (2) stimulates your immune system against the pathogens (3) kills any pathogenic bacteria in your body (4) changes pathogenic bacteria into harmless...
*Wednesday, May 2, 2012 at 5:37pm by George wang*

** math**

A type of bacteria doubles in number every 12 hours. After 2 days, there are 48 bacteria. How many bacteria were there at the beginning of the first day.
*Wednesday, November 13, 2013 at 4:38pm by Taylor*

**Chem**

suppose that you place exactly 100 bacteria into a flask containing nutrients for the bacteria and that you find the following data at 37 °C: t (min):0 15.0 30.0 45.0 60.0 Number of bacteria: 100 200 400 800 1600 What is the order of the rate of production of the bacteria? How...
*Wednesday, March 12, 2014 at 10:57pm by Bri*

**Math**

A certain bacterium divides into 2 bacteria every 20 minutes. If there are four bacteria in the culture now, how many will there be in 4 hours, assuming that no bacteria die?
*Monday, March 26, 2012 at 7:27pm by Garz*

**Health (Ms. Sue)**

Describe how bacteria develop antibiotic diseases. A: Bacteria develop antibiotic resistance when a person stops taking antibiotics before the prescription is finished. By doing this, most of the bacteria die, but some more resistant bacteria survive and multiplies, which can ...
*Wednesday, November 20, 2013 at 3:07pm by Anonymous*

**pre calculus**

if there are initial 2500 bacteria in a culture, and the number of bacteria double each hour, the number of bacteria after t hours cab n be found using the formula=N=2500(2^t).how long will it take the culture to grow to 75,000 bacteria.
*Friday, December 17, 2010 at 7:58am by john*

**Calculus**

Suppose that a population of bacteria triples every hour and starts with 700 bacteria. (a) Find an expression for the number n of bacteria after t hours. n(t) = ? (b) Estimate the rate of growth of the bacteria population after 1.5 hours. (Round your answer to the nearest ...
*Tuesday, November 3, 2009 at 5:21pm by Alex*

**precal**

A petri dish contains only two bacteria. The bacteria divide every half hour. How many bacteria will exist after 3 hours? I thought it'd be 12, but apparently not.
*Thursday, September 2, 2010 at 10:41pm by Anonymous*

**biology**

There is a bacteria called botulism which will grow in anaerobic conditions. This bacteria can be found in improperly canned food, as a result a toxin is produced which can be deadly to humans. What does this bacteria have to do with BOTOX?
*Wednesday, August 11, 2010 at 5:16am by peter*

**Physics**

On earth, a certain type of bacteria doubles in number every 24 hours. Two cultures of these bacteria are prepared, each consisting initially of one bacterium. One culture is left on earth and the other is put on a rocket travelling at .866c relative to the earth. By the time ...
*Wednesday, May 25, 2011 at 11:10pm by Joe Schmo*

**Algebra 2**

If there are initially 1500 bacteria in a culture, and the number of bacteria double each hour, the number of bacteria after t hours can be found using the formula N=1500(2^t). How many bacteria will present after 7 hours? I think the answer is N=192,000. Is this correct?
*Thursday, March 1, 2012 at 3:51am by Emily*

**math**

The number of bacteria in a culture is modeled by: n(t) = 1330e^(0.42t) (a) The initial number of bacteria is: (b) The relative rate of growth of this bacterium population is: (c) The number of bacteria after 3 hours is: (d) After how many hours will the number of bacteria ...
*Monday, November 19, 2012 at 6:40pm by NotGonnaSay*

**chemistry**

Suppose that you place exactly 100 bacteria into a flask containing nutrients for the bacteria and that you find the following data at 37 °C: TIme (s) number of bacteria 0 100 19 200 38 400 57 800 76 1600 what is the rate order? What is rate constant? how many bacteria will be...
*Sunday, March 25, 2012 at 8:43pm by HELP PLEASE*

**calculus**

A bacteria culture starts with 900 bacteria and the population doubles every 4 hours. Find an expression for the number of bacteria after t hours.
*Friday, November 5, 2010 at 3:07pm by Anonymous*

**Calc**

The number of bacteria in a culture is increasing according to the law of exponential growth. There are 125 bacteria in the culture after 2 hours and 350 bacteria after 4 hours. a) Find the initial population. b) Write an exponential growth model for the bacteria population. ...
*Thursday, January 6, 2011 at 9:58pm by Erica*

**Algebra**

The number of bacteria in a stagment pond doubles every hour. A farmer sprays it every two hours and kils 3/4 of bacteria immediately. If there are 10,000 live bacteria left after the farmer sprays at noon, how many live bacteria are there at 11 p.m. that night?
*Wednesday, December 12, 2012 at 7:44pm by Jenny*

**Pre-Calc (exponential growth)**

A COLONY OF BACTERIA IS GROWN UNDER IDEAL CONDITIONS IN A LAB SO THAT THE POPULATION INCREASES EXPONENTIALLY WITH TIME. At the end of the three hours, there are 10,000 bacteria. At the end of the 5 hours, there are 40,000 bacteria. How many bacteria were present initially? I ...
*Sunday, March 28, 2010 at 6:55pm by Phillip*

**math**

A type of bacteria doubles in number every 12 hours. After 2 days, there are 48 bacteria. How many bacteria were there at the beginning of the first day. I know the answer is 3, but want to know how it arrived at the number "3"
*Wednesday, November 13, 2013 at 7:42pm by Taylor*

**math modeling**

At 3a.m., there is a colony of 736 bacteria, and it is growing at a continuous hourly rate of 10.77%. How many bacteria are there at 7p.m.? Round your answer to the nearest whole number of bacteria.
*Tuesday, October 25, 2011 at 4:08pm by math *

**math**

The number of bacteria in a culture is modeled by n(t)=1710e071t (a) The initial number of bacteria is (b) The relative rate of growth of this bacterium population is (c) The number of bacteria after 3 hours is (d) After how many hours will the number of bacteria reach 10,000...
*Saturday, May 12, 2012 at 5:20pm by someone*

**Math**

he number of bacteria in a culture is modeled by n(t)=1710e071t (a) The initial number of bacteria is (b) The relative rate of growth of this bacterium population is (c) The number of bacteria after 3 hours is (d) After how many hours will the number of bacteria reach 10,000? ...
*Saturday, May 12, 2012 at 10:04pm by someone*

**Geometry**

Suppose you are studying bacteria in biology class the table shows the number of bacteria after n doubling periods n(periods)[0 1 2 3 4 5] billions of bacteria [3 6 12 24 48 96] your teacher asks you to predict the number of bacteria after 8 doubling periods. what would your ...
*Monday, March 8, 2010 at 12:04am by Anonymous*

**Math**

a culture started with 2000 bacteria. after 2 hour , it grew to 2,400 bacteria. predict how many bacteria will be present after 10 hours. round your answer to the nearest whole number.
*Sunday, November 7, 2010 at 1:37am by linh*

**Math**

Bacteria A has an initial population of 500 and doubles everyday. Bacteria B has an initial population of 50 and triples everyday. How long will it take the population of bacteria B to overtake the population of bacteria A
*Sunday, October 27, 2013 at 9:06pm by Paul*

**math**

I am submitting agian, I am not sure the answer someone gave sounds correct. We are learning about exponents. A type of bacteria reproduces by splitting in two every thirty minutes. How many bacteria will there be after 4 hours if there are 2 bacteria to begin with?
*Wednesday, November 3, 2010 at 7:07pm by Kam*

**math**

It takes 28 minutes for a certain bacteria population to double. If there are 4,241,763 bacteria in this population at 1:00 p.m., which of the following is closest to the number of bacteria in millions at 4:30 pm on the same day?
*Thursday, September 9, 2010 at 4:33pm by Ross*

**Math**

The amount of bacteria after n min if the initial amount of bacteria is q and the amount of bacteria doubles every minute. (Hint: The answer should contain q as well as n.)
*Wednesday, June 9, 2010 at 11:03pm by Mike*

**math**

The amount of bacteria after n min if the initial amount of bacteria is q and the amount of bacteria triples every 30 sec. (Hint: The answer should contain q as well as n.)
*Saturday, August 18, 2012 at 11:43am by mary*

**calculus**

2. The rate of change in the number of bacteria in a culture is proportional to the number present. In a certain laboratory experiment, a culture has 10,000 bacterial initially, 20,000 bacteria at time t1 minutes, and 100,000 bacteria at (t1 + 10) minutes. a. In terms of t ...
*Friday, March 30, 2012 at 8:35am by naseba*

**math**

A colony of bacteria is growing in a petri dish which has a maximum capacity of 100mg. The mass of bacteria is increasing at a rate given by the logistic equation. Initially there is 2mg of bacteria and the rate of increase is 1mg per day.
*Friday, February 21, 2014 at 3:56am by Sam*

**Science**

Milk sours quickly because it is almost a perfect medium to grow bacteria. If it is pasteurized, nearly all the bacteria were killed in that process, but some remain, and more likely, the milk can become contaminated with bacteria from the air. Being a near perfect medium to ...
*Friday, December 12, 2008 at 8:55pm by bobpursley*

**Algebra**

It takes 30 days to fill a laboratory dish with bacteria. If the size of the bacteria doubles each day. How long did it take for the bacteria to fill one half of dish?
*Sunday, January 1, 2012 at 2:45pm by Anonymous*

**Algebra**

It takes 30 days to fill a laboratory dish with bacteria. If the size of the bacteria doubles each day, how long did it take for the bacteria to fill one half of dish?
*Sunday, January 1, 2012 at 2:45pm by Anonymous*

**algebra**

It takes 30 days to fill a laboratory dish with bacteria. If the size of the bacteria doubles each day. How long did it take for the bacteria to fill one half of dish?
*Monday, January 2, 2012 at 4:34pm by Anonymous*

**Bacteria**

What structural features of bacteria do you think help them to survive? Name four characteristics of bacteria that aid them in producting disease. http://en.wikipedia.org/wiki/Bacteria please read the link and then think about these statements: fast reproductive rate tough ...
*Friday, February 23, 2007 at 8:18pm by Sabrina*

**Algebra 2**

A culture started with 2,000 bacteria. After 6 hours, it grew to 2,200 bacteria. Predict how many bacteria will be present after 12 hours. Round to the nearest whole number.
*Tuesday, May 7, 2013 at 1:18pm by Kevin*

**Precalculus **

NEED HELP ASAP PLEASE!! A bacteria culture starts with 2000 bacteria and the population doubles every 3 hours. a) A function that models the number of bacteria after t hours is p(t)=____________? b) The number of bacteria present after 5 hours will be about _____ ? c) The ...
*Thursday, March 4, 2010 at 6:07pm by jh*

**Math**

I need some help. A biologist finds that the population of a certian type of bacteria double seach half-hour. An initial culture has 60 bacteria. 1. What is the population after 3 hours? 2. How long will it take for the number of bacteria to reach 983,040?
*Tuesday, April 9, 2013 at 6:11pm by Kris*

**Calculus :)**

The number of bacteria in a culture is modeled by n(t)=1550e^(0.24t) (a) The initial number of bacteria is _____ (b) The relative rate of growth of this bacterium population is _____ (c) The number of bacteria after 3 hours is _____ (d) After how many hours will the number of ...
*Monday, August 22, 2011 at 11:35pm by Brit*

**Living Environment(please check answers)**

1-true 2-false 3-not enough info Transplanting genetic material into bacteria is a simple task- 2 Under certain conditions, bacteria reproduce at a rapid rate-3 The continued use of insulin from animals many cause harmful side effects in some people- 1 The bacteria used in ...
*Monday, March 12, 2012 at 6:50pm by Anna*

**Bacteria**

I was growing some bacteria in Petri dishes that I got from wiping my hand with a q-tip. Condensation appeared directly above the bacteria when they got somewhat large. Was this H20 or something else? And why did it form? Humm The products of ellular respiration are water and ...
*Sunday, January 14, 2007 at 10:48pm by Sara*

**math**

The bacteria in a certain culture double every 7.5 hours. The culture has 6,500 bacteria at the start. How many bacteria will the culture contain after 3 hours? Select one:
*Friday, October 25, 2013 at 8:20pm by Anonymous*

**Pre Cal**

A certain strain of bacteria divides every four hours. If a colony is started with 10 bacteria, then the time t (in hours) required for the colony to grow to N bacteria is given by t = 4(log(N/10)/log2 Find the time required for the colony to grow to one million bacteria. (...
*Monday, February 13, 2012 at 11:06pm by Melek*

**math**

A bacteria culture starts with 260 bacteria and grows at a rate proportional to its size. After 4 hours there will be 1040 bacteria. (a) Express the population after t hours as a function of t. this is what i put as my answer but i guess its not right do i replace the four ...
*Sunday, November 8, 2009 at 7:59pm by aman*

**Health (Ms. Sue)**

Describe how bacteria develop antibiotic resistance. A: Bacteria develop antibiotic resistance when it changes in a manner in which reduces or eliminates the effectiveness of drugs, chemicals, or other agents designed to cure or prevent infections. Also, if a person stops ...
*Wednesday, November 20, 2013 at 7:42pm by Anonymous*

**Math**

. A lab is growing bacteria in a culture dish. The amount of bacteria in the dish doubles every 4 hours. Initially, there are 900 bacteria in the dish. How many are in the dish after 12 hours?
*Sunday, November 7, 2010 at 1:37am by Anonymous*

**math 12**

The bacterium Escherichia coli, or E-coli, has a doubling period of 0.32 h. If a culture starts with 100 bacteria: (a) Determine the equation for the number of bacteria, y, in x hours. b) How many hours will pass before there are 450 bacteria in the culture?
*Sunday, May 6, 2012 at 1:18am by saya*

**Problem Solving math**

The amount of bacteria after n min if the initial amount of bacteria is q and the amount of bacteria doubles every minute. I suggest you make a table.Start with 0 time and 1 bug. time #bugs 0 &sbsp 1 1 &sbsp 2 2...
*Sunday, September 3, 2006 at 10:09pm by Krisy*

**math problem-**

Bacteria grow in a nutrient solution at a rate proportional to the amount present. Initially, there are 250 strands of the bacteria in the solution which grows to 800 strands after seven hours. Find the time needed for the bacteria to grow to 1600 strands.
*Saturday, May 12, 2012 at 5:15am by gwapa*

**Science**

a. Bacteria change the sugar in milk to lactic acid. Is true Fermentation. b. Bacteria change nitrogen into a form plants can use. True nitrogen fixation c. Bacteria change harmful chemicals into harmless ones. True Bioremediation d. Bacteria change oxygen into nitrogen. True ...
*Friday, February 1, 2013 at 7:20pm by Devron*

**Algebra**

A lab is growing bacteria in a culture dish. The amount of bacteria in the dish doubles every 3 hours. Initially, there are 500 bacteria in the dish. How many are in the dish after 9 hours? My answer: 4000 -(5)^-1 My answer: -1/5
*Thursday, February 6, 2014 at 12:22pm by Anonymous*

**math**

A lab is growing bacteria in a culture dish. The amount of bacteria in the dish doubles every 3 hours. Initially, there are 500 bacteria in the dish. How many are in the dish after 9 hours? My answer: 4000 -(5)^-1 My answer: -1/5
*Thursday, February 6, 2014 at 2:24pm by Anonymous*

**biology**

fungi and bacteria are the two largest groups of primary bacteria.
*Tuesday, December 15, 2009 at 3:07pm by bobpursley*

**Maths **

A population of 3.5 million bacteria increases by 48800 How many bacteria are there now?
*Sunday, March 23, 2014 at 8:38am by Sarah*

**Biology-Bacteria**

What are the two basic ways that bacteria cause disease? Thanks
*Monday, April 14, 2008 at 6:16pm by Sue*

**biology**

assuming that there are 5 bacteria found in a glass of water. what is the population. of bacteria if it will not be controlled for 6 hours?
*Monday, July 11, 2011 at 9:19am by Anonymous*

**medical **

If one bacteria will double every 20 minutes, how many bacteria will there be I'm 24 hours
*Thursday, October 27, 2011 at 8:17pm by dest*

**microbio**

how large are bacteria? what are the requirements for autoclaving bacteria
*Tuesday, October 27, 2009 at 10:18pm by lyne*

**Biology**

List two ways bacteria and blue-green bacteria differ. Any help would be appreciated. :)
*Tuesday, March 27, 2012 at 11:07am by Kai :)*

**science**

If I had bacteria that were asexual and bacteria that were sexual in a pond- which would be most likely to survive disease and why?
*Saturday, August 21, 2010 at 8:54pm by Anonymous*

**Math**

Salmonella bacteria grows rapidly in a nice warm place. If just a few hundred were left on a cutting board when a chicken was cut up, and they get into the potato salad, the population begins compounding. Suppose the number present in the potato salad after x hours is given by...
*Thursday, February 13, 2014 at 5:51pm by Andy*

**Science**

which organisms are most important for a healthy lawn? a-birds, b-moss, c-bacteria, d-leaf hoppers, e-bees C=Bacteria
*Wednesday, September 11, 2013 at 11:19am by Lukas*

**Please I'm begging someone help me with biology**

For starters, they are in completely different kingdoms (fungi are in the kingdom fungi and bacteria are kingdom Monera). Fungi are eukaryotes and bacteria are prokaryotes. Bacteria are single celled; whereas, most fungi are multicellular but some fungi are single celled (like...
*Thursday, December 13, 2012 at 7:55pm by kazz*

**Please I'm begging someone help me with biology**

For starters, they are in completely different kingdoms (fungi are in the kingdom fungi and bacteria are kingdom Monera). Fungi are eukaryotes and bacteria are prokaryotes. Bacteria are single celled; whereas, most fungi are multicellular but some fungi are single celled (like...
*Thursday, December 13, 2012 at 7:54pm by kazz*

**science**

The good bacteria eat the bad bacteria keeping them under control so you don't get sick. AND they also help you digest some foods as well.
*Sunday, March 30, 2008 at 1:45pm by ~christina~*

**Biology Honours**

what's another purpose of staining bacteria besides it being a help to identify groups of bacteria? why are cells counter-stained with safranin?
*Monday, March 15, 2010 at 10:51pm by Anonymous*

**social studies**

Isn't the canning process done at high temperatures, so that bacteria and spores cant survive, then sealed with no air? How would bacteria get in and grow?
*Monday, January 3, 2011 at 6:58pm by bobpursley*

**Biology **

You have a flask with 100ml of fresh media. You place 200 bacteria int he flask. Assume that the bacterai were previously growing in the same kind of media and so the lag is 0. If you knew that this species of bacteria has a doubling time of 45 min in these particular conditon...
*Sunday, September 23, 2012 at 1:45pm by Anonymous*

**math 12**

the population of a bacteria coleny, p, is doubling every day,d, according to the equation p=2^d. five days later, the population of another bacteria colny, q, is quadrupling everyday,d, according to the equation q=4^d-5. when will the populations of the two bacteria be equal...
*Tuesday, December 18, 2012 at 5:01pm by miechelle*

**math**

i have this question the population fucntion of bacteria is observed to be f(t)=C e^2t where C is some constant. if after one hour a scientist abserves the growth rate to be 744 bacteria/hour what was the initial bacteria population. i know that C is the inital bacteria ...
*Thursday, October 12, 2006 at 5:26pm by Jessica*

**Jake1214**

Let's say penicillin can kill the bacteria. After using it for 10 years, the bacteria developed resistance to penicillin, so no one is using penicillin anymore because it has no effect. After 15 years, reports have found that most of the bacteria loss the penicillin resistant ...
*Wednesday, December 19, 2007 at 2:08pm by Antibotics - Resistance Evolution*

**precalculas**

the amount of bacteria in a petri dish increased by a percent change of 12% each hour over a period of 15 hours. a. find the growth factor for 1 hour? b. by what total percent did the bacteria change during this 15- hour time period.? c. how long will it take for the bacteria ...
*Tuesday, March 1, 2011 at 12:28am by katrina*

**Physics**

Time on the rocket goes more slowly, as seen by earth-based observer. The elapsed time on the rocket is lower by a factor sqrt[1-(v/c)^2] = sqrt(0.25) = 1/2 2^8 = 256 is the number of bacteria that are produced on earth during the time interval you are discussing. The rocket's...
*Wednesday, May 25, 2011 at 11:10pm by drwls*

**Science**

What would be the origin of endosporeforming bacteria in pepper and other dried foods such as oregano? and.. How would a high number of endosporeforming bacteria in pepper affect the quality and other prepared and vacuum-packaged ready-to-eat foods? I know what ...
*Monday, October 19, 2009 at 11:23am by Andrew*

**Math**

Suppose that the number of bacteria in a certain population increases according to an exponential growth model. A sample of 2600 bacteria selected from this population reached the size of 2873 bacteria in two and a half hours. Find the continuous growth rate per hour. Write ...
*Monday, February 21, 2011 at 4:16pm by Rachal*

**science**

Some types of soil bacteria can form the nitrogen compounds that plants need. This is known as........... fixation bacteria. There are many kinds of them. THe most important belong to the genus Rhizobium
*Friday, March 30, 2007 at 3:22pm by Hillary*

**Math**

Bacteria experiences exponential growth, increasing 17% every hour. If there are 800 bacteria now, in how many hours will there be 2000? How would I go about this problem?
*Monday, August 1, 2011 at 7:30pm by Meghan*

**Algebra**

The number of bacteria in a certain population increases according to an exponential growth model, with a growth rate of 11% per hour. An initial sample is obtained from this population, and after four hours, the sample has grown to 4130 bacteria. Find the number of bacteria ...
*Thursday, February 3, 2011 at 7:13pm by Rachal*

**Math**

A pathologist, trying to identify a bacterial infection, places a sample in a growth chamber and measures 1000 bacteria at the end of day 5 of the test. From daily measurements, the growth rate of the number of bacteria is determined to be 5% per day. Note that: A linear ...
*Tuesday, October 25, 2011 at 11:54pm by Matt*

**Math**

I'm not sure how to do this question 7. The growth of bacteria in culture can be described by the equation N1 = N0e' where N is the number of bactena at any time t, No is the initial number of bacteria, and k is a constant. The time taken for growth to double the number of ...
*Tuesday, December 15, 2009 at 7:55am by amelia*

**Pre-Calculus**

The population of a particular type of bacteria doubles in number every 12 hours. a)if there are 8 bcteria initially, write an equation that models the number of bacteria present after x 12 hours. b)How many bacteria will be present after 5 days? by using this formula N(t)=N0(...
*Monday, December 21, 2009 at 12:34am by Amy*

**English**

1) OK 2) In particular, we prepared a genetically modified bacteria, the ..., which can survive using arsenic instead of phosphorous in building its DNA. 3) Actually, it contains a recombined plasmid in which we inserted the necessary sequences to interrupt the pathogenic ...
*Wednesday, February 15, 2012 at 10:10am by Writeacher*

**bacteria**

at 52 degrees F, how fast does bacteria grow? At 37 degrees F, how fast does bacteria grow?
*Friday, July 5, 2013 at 8:11pm by rose*

**Math- Alg 2**

A colony of bacteria is growing exponentially according to the function below, where T is in hours. How many bacteria are there after 7 hours? B(T)= 4*e^(0.8)T
*Thursday, January 26, 2012 at 10:52pm by Karen*

**Science**

When an antibiotic is used, some of the bacteria may be more able to survive it than others. The more-resistant bacteria survive to reproduce and pass their resistant genes to the next generation. The less-resistant bacteria don't get the chance to reproduce. Therefore, the ...
*Wednesday, February 4, 2009 at 6:02pm by Noether*

**math**

2. A bacteria population grows exponentially with growth rate k=2.5 how long it would take for the bacteria population to double its size?
*Tuesday, November 12, 2013 at 6:52pm by hannah*

**Chemistry**

concn of bacteria in tube A = 1,000,000,000 per 10 mL or 1E9/10 = 1E8 = 100,000,000/mL. That's the concn (if you want it quoted in bacteria/mL) and the number of bacteria is the same since you put 1 mL in
*Tuesday, November 27, 2012 at 6:45pm by DrBob222*

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