# A culture starts at 8600 bacteria. After one hour the count is 10,000. Find a function that models the number of bacteria n(t) after t hours. The answer is n(t) = 8600e^.1506t Where does this 0.1506 come from?

237,516 results, page 14

1. ### science

how long does it take bacteria to show up on agar
2. ### science

how do bacteria in the human intestine help maintain health?

4. ### science

Methylococcus capsulatatus. How is this bacteria spread or passed?
5. ### science

what way is bacteria and fungi important to the environment?
6. ### bio II

what is the "transforming factor" that alters pneumonia bacteria?

Why are cyanobacteria not bacteria? Is it because they can be nitrogen fixers?
8. ### science

differentiate between helpful and harmful bacteria

10. ### science

what are some characteristics bacteria have which viruses don't?
11. ### science

which cause more severe illnesses? bacteria or viruses?
12. ### Science

Acrostic Statement from the word Bacteria pls. :)
13. ### spellings

Spell the word bacteria back words
14. ### maths, variations

i'm not sure how this question works the number of hours (h) taken to paint a picture is inversely proportional to th number of pupils (p) painting it. it takes 4 pupils 3 hours to finish painting it assuming all pupils work at the same rate. a) find an equation connecting h ...
15. ### MATH 112

two planes leave an airport at the same time. Their speeds are 320 miles per hour and 380 miles per hour. If the angle between their courses is 112 degrees, how far apart are they after two hours? (The hint is using the law of cosines)
16. ### MATH PLZ SOMEONE HELP

7. Suppose you earn \$10 each hour you babysit. Which function describes the relationship between your total earnings E and the number of hours you babysit, h? (1 point) E(h) = 10h E(h) = h + 10 E(h) = h – 10 h = 10E
17. ### math

at the start of your school year as a veterinary tech, you receive a raise of \$750. you expect to receive the same raise every year. your total yearly salary after your first raise is \$18,000 per year write an equation that models your total salary (s) in terms of the number ...
18. ### Algebra 1

The temperature outside was 72 degrees at 6 am. The temperature rose 4 degrees per hour for the next 12 hours. The total temperature is a function of the number of hours the temperature rose. What are the independent variable and dependent variable
19. ### math

2. Geoff planted dahlias in his garden. Dahlias have bulbs that divide and reproduce underground. In the first year, Geoff’s garden produced 6 bulbs. In the second year, it produced 12 bulbs, and in the third year, it produced 24 bulbs. If this pattern continues, how many ...
20. ### statistics

Computer Services wants to estimate the mean number of hours college students use on campus computers each day. They want to be within .1 hour of the true value with 99% confidence. From a previous study, the standard deviation is assumed to be .6 hour. What size sample is ...
21. ### algebra 2

Rosalyn works no more than 16 hours a week during the school year. she is paid \$10 and hour for tutoring geometry students and \$7 an hour for delivering pizzas for Pizza King. She wants to spend at least 6 hours but no more than 8 hours a week tutoring. Find Rosalyn's maximum ...
22. ### algebra1 HELP PLEASE Thanks you!!

The function gives the speed in feet per second (ft/s) of a free-falling object after it has fallen x feet (ignoring air resistance). FInd the speed of the object after it has fallen 25 feet. If necessary, round your answer to the nearest tenth.
23. ### Finance

You have a balance of \$12,000 for your tuition on your credit card and you make no further charges. If your APR is 16.7% and each month you make only the minimum payment of 2% of your balance, then find a formula for the balance after t monthly payments. A. 12,000(0.966362)t B...
24. ### Algebra 1

After 5 lessons of French, you have learned 20 vocab words. After 10 lessons, you know 40 vocab words. Write an equation that gives the number of vocabulary words you know as a function of the number of the lessons you have had. Label variables. So, 5x+20 Isn't it? Somebody ...
25. ### Chemistry

Tube worms that survive near geothermal vents of hydrogen sulfide rely on bacteria living inside them to obtain energy by the oxidation of H2S to SO4^2-. What is the overall change in the oxidation number of sulfur for this reaction?
26. ### Math

Average height of a species of tree (in feet) after a certain number of years Years----------Height 1 ------------- 2.1 2 ------------- 3.2 3 ------------- 6.8 4 ------------- 7.3 5 ------------- 11.2 6 ------------- 12.6 7 ------------- 13.4 8 ------------- 15.9 What is the ...
27. ### Math

Average height of a species of tree (in feet) after a certain number of years Years----------Height 1 ------------- 2.1 2 ------------- 3.2 3 ------------- 6.8 4 ------------- 7.3 5 ------------- 11.2 6 ------------- 12.6 7 ------------- 13.4 8 ------------- 15.9 What is the ...
28. ### Math

Average height of a species of tree (in feet) after a certain number of years Years----------Height 1 ------------- 2.1 2 ------------- 3.2 3 ------------- 6.8 4 ------------- 7.3 5 ------------- 11.2 6 ------------- 12.6 7 ------------- 13.4 8 ------------- 15.9 What is the ...
29. ### Algebra I

Average height of a species of tree (in feet) after a certain number of years Years----------Height 1 ------------- 2.1 2 ------------- 3.2 3 ------------- 6.8 4 ------------- 7.3 5 ------------- 11.2 6 ------------- 12.6 7 ------------- 13.4 8 ------------- 15.9 What is the ...
30. ### ECONOMICS - Perfect Competition

Please check and correct my answers. Thank you. 1) Jack Benny can get blood from a stone. If he has x stones, the number of pints of blood he can extract from them is f(x) = 2x^(1/3). Stones cost Jack w dollars each. Jack can sell each pint of blood for p dollars. a) How many ...
31. ### algebra 1

betty leaves her purse in a store at the mall and average 36mi/h on her way home to Glenville, 140 miles away. Honesty harry discovers her purse and starts after her one hour later. if he averages 48mi/h how long will it take him to catch betty? will he catch her before she ...
32. ### Algebra 1

You have decided to get a job to pay for a car to drive. You estimate it will cost you \$300 per month to buy and maintain the car. You get a job that pays \$9.10 per hour. Write an equation for your pay as a function of the hours worked (Use x for the hours and y for the pay). ...
33. ### Algebra 1

You have decided to get a job to pay for a car to drive. You estimate it will cost you \$300 per month to buy and maintain the car. You get a job that pays \$9.10 per hour. Write an equation for your pay as a function of the hours worked (Use x for the hours and y for the pay). ...
34. ### Algebra 1

You have decided to get a job to pay for a car to drive. You estimate it will cost you \$300 per month to buy and maintain the car. You get a job that pays \$9.10 per hour. Write an equation for your pay as a function of the hours worked (Use x for the hours and y for the pay). ...
35. ### history

What impact did the Napoleonic Wars have on popular culture? The magnitude of Napoleon’s war on Europe led to the destruction of important museums and art galleries throughout the continent. As one of the most significant events of the 19th century, the Napoleonic Wars ...
36. ### Precalculus

Could someone help/verify these answers~ Thanky you! 1.What is the range of the reciprocal function of f(x)=10-x^2? a) {YER|y≥1/10} b) {YER|y≥10} c) {YER|1/10≤y<0} d) YER|y<0 or y≥1/10} Answer: D? ---------------------------------------- 2. It ...
37. ### Math

larry places \$ 520 in saving account that earns 3.2 simple interest. find the total amount in the a count after 2 years
38. ### Math

Tricia spent \$12 to rent ice skates. She rented them for 4 hours. Which number sentence can you write to find how much it costs to rent skates for one hour?
39. ### pre-calc

One day, a controversial video is posted on the Internet that seemingly gives concrete evidence of life on other planets. Suppose that 50 people see the video the first day after it is posted and that this number doubles everyday after that. a) write an expression to describe ...
40. ### math

2. Geoff planted dahlias in his garden. Dahlias have bulbs that divide and reproduce underground. In the first year, Geoff’s garden produced 6 bulbs. In the second year, it produced 12 bulbs, and in the third year, it produced 24 bulbs. If this pattern continues, how many ...
41. ### College Algebra

In 1977, a math professor bought her condominium for \$60,000. The value of the condo has risen steadily so that in 2007 real estate agents tell her the condo is now worth \$750,000. Find a formula to represent these facts about the value of the condo V (t), as a function of ...
42. ### Math

Two cars start at the same time from two places 330 km. apart and travel toward each other.Car A travels at 50 kph and Car B at 45 kph. If Car A rests for one hour on the way, in how many hours after they left will they meet?
43. ### math help pls pls

Meg initially has 3 hours of pop music and 2 hours of classical music in her collection. Every month onwards, the hours of pop music in her collection is 5% more than what she had the previous month. Her classical music does not change. Which function shows the total hours of ...
44. ### math

This was a question asked yesterday that I am stuck on also -- could you explain how to solve this using this "log" on the calculator please? I'm working on a problem where I was given a table and had to find the exponential equation of best fit. The table is about the number ...
45. ### Embedde System and IC Design.

Write a program that will count down from the last (4) digits of the student ID 1119939 until zero. Once completed, the function will reset and count down again. Assume the last two (2) digits of the student ID is a decimal number, and crystal oscillator is 11.0592MHz.
46. ### math

A blue candle is twice as long as a red one. The blue takes 6 hours to burn out and red takes 15 hours. After 5 hours, what fractional part of each is left? Thanks for your help!
47. ### math

A blue candle is twice as long as a red one. The blue takes 6 hours to burn out and red takes 15 hours. After 5 hours, what fractional part of each is left? Thanks for your help!
48. ### Algebra

The number of bass in a lake is given by P(t) = 2800/1 + 6e^−0.05t where t is the number of months that have passed since the lake was stocked with bass. (a) How many bass were in the lake immediately after it was stocked? 400 bass (b) How many bass were in the lake 1 ...
49. ### math

a) The sales representative here tells you they also have two floor plans available, but they only have 54 homes available. Write an equation that illustrates the situation. Use x and y to denote floor plan #1 and floor plan #2 respectively. X+Y=54 or Y=(54-x)with the ...
50. ### algorithm

can someone tell me if this is correct. Write an algorithm that will display the sum for a given number of squares. In other words if the user enters the value 5, then the output should be 1^2 + 2^2 + 3^2 +4^2 + 5^2 = 55. sumsquare integer square integer count integer ...
51. ### math

If Sue worked 6 3/4 hours on Monday, 4 hours on Tuesday, 7 3/4 hours on Wednesday, 8 hours on Thursday, and 5 1/2 hours on Friday, calculate her weekly wage at \$7.20 per hour.
52. ### algebra1 HELP PLEASE Thanks you!!

The function f(x)=5 square root of x gives the speed in feet per second (ft/s) of a free-falling object after it has fallen x feet (ignoring air resistance). FInd the speed of the object after it has fallen 25 feet. If necessary, round your answer to the nearest tenth.

A boat costs \$92,000 and depreciates in value by 15% per year. How much will the boat be worth after 10 years? 18,112.45 78,200 18,941.98 69,000 Is the answer the first one? Could somebody write down the steps for me please? Thanks
54. ### Math, Precalc

A fishing boat leaves port at 4 miles per hour at a bearing of 80∘ for 3 hours, then turns to a bearing of 0∘ at 3 miles per hour for 4 hours, and finally changes to a bearing of 200∘ at 6 miles per hour for 5 hours. At this point, the boat heads directly back to port at...
55. ### physics

A remote control toy car starts from rest and moves with constant unkown acceleration. After half a second it has travel 0.65m. How far has it traveled after 3 seconds?
56. ### math

A fishing boat leaves port at 11 miles per hour at a bearing of 210 degrees for 2 hours, then turns to a bearing of 250 degrees at 8 miles per hour for 4 hours, and finally changes to a bearing of 280 degrees at 7 miles per hour for 2 hours. At this point, the boat heads ...

____ kg = 440 g ((Help Please)) ____ kg 1,006,000 ((Help Please)) 8.6 kg = ____ g ((8600/0.0086??)) 800 g = ____ mg ((800.000??)) 1.7 kg = ____ ((1700/0.0017??)) ____ mg = 6.2 kg ((Help please)) (((((I understand it it's just I can't get a correct answer again.Can someone help...
58. ### Algebra

Last question I hope...here is the problem This equation illustrates your remaining funds after paying for rent and utilities. How much money is left? Explain how you arrived at your answer. \$38,250 + \$80,000+ \$22,250-0.25(\$80,000 + \$38,250) = to get the answer would you add ...
59. ### math: pre-calculus

You have 5 grams of carbon-14; whose half-life is 5730 years. a)Write the rule of the function that gives the amount of carbon-14 remaining after x years. b)How much carbon-14 will be left after 4,000 years? c)When will there be just 1 gram left?
60. ### arithmetic

you can email me if you want i have more. A man owned 75 shares of stock worth \$50 each. The corporation declared a dividend of 8 percent payable in stock. How many shares did he then own? 81 shares but how? If a scow is towed at the rate of 3 miles an hour, how many hours ...
61. ### Algebra

Can anyone tell me if this answer is correct? Solve the problem. Let's imagine that in 2001, a surgeon performs the first brain transplant, the only transplant performed that year. If in 2010, there are 983 brain transplants, find an exponential growth function that fits the ...
62. ### algebra word problem

A long distance runner starts at the beginning of a trail and runs at a rate of 5 miles per hour. One hour later, a cyclist starts at the beginning of the trail and travels at a rate of 13 miles per hour. What is the amount of time that the cyclist travels before overtaking ...
63. ### Math

A watch loses 30 second hour. If the watch was set right on Sunday at 11:30 p.m. What day and time did it show after 10 hours? 10 * 30 = 300 5 min
64. ### math

8 workers together at the same rate finished a painting job in 5 hours. hour long would it take 12 such workers working at the same rate to finish the same job? each worker finished____(fraction) of the job in one hour. 12 workers finished_____(fraction) of the job in one hour...
65. ### Science

____ bacteria carry out the conversion of gaseous nitrogen to a biologically useful form of nitrogen. My answer is "nitrogen-fixing" (This is fill in the blank)

When is the best time to read review the discussion questions? A. Immediately after you have finished all of the reading. B. After you write your notes. C. Before you begin any detailed reading. D. At least 1 hour after your detailed reading.

When is the best time to read review the discussion questions? A. Immediately after you have finished all of the reading. B. After you write your notes. C. Before you begin any detailed reading. D. At least 1 hour after your detailed reading.
68. ### Maths

The average depth of the water in a port on a tidal river is 4 m. At low tide, the depth of the water is 2 m. One cycle is completed approx every 12 h. a) find an equation of the depth d(t) metres, with respect to the average depth, as a function of the time, t hours, after ...
69. ### Math

An object is propelled vertically upward from the top of a 144-foot building. The quadratic function s(t)= -16t2+192+144 models the ball's height above the ground, in feet, s(t) seconds after it was thrown. How many seconds does it take until the object finally hits the ground...
70. ### Physics

A 4 kg block slides down a frictionless incline making an angle of 60° with the horizontal. (a) What is the total work done on the block when the block slides 2 m (measured along the incline)? (b) What is the speed of the block after it has slid 1.5 m if it starts from rest...
71. ### math

Sue left her home at 6 A.M. driving her car at the rate of 50 miles per hour. At 8 A.M. her brother Kevin drove after her along the same highway, traveling at the rate of 60 miles per hour, in how many hours did Kevin pass Sue.
72. ### algerbra

parking in a student lot costs \$1 for the first half hour and \$1.25 for each hour there after. a partial hour is charged the same as a full hour what is the longest time that a student can park in this lot for \$7?
73. ### math

Traveling at 55 miles per hour,approximately how long will it take Michael to drive 250 miles? (1) between 1 and 2 hours (2) between 2 and 3 hours (3) between 3 and 4 hours (4) between 4 and 5 hours (5) between 5 and 6 hours I think the answer is 4?
74. ### statistics

(10 pts) Using diaries for many weeks, a study on the lifestyles of visually impaired students was conducted. The students kept track of many lifestyle variables including how many hours of sleep obtained on a typical day. Researchers found that visually impaired students ...
75. ### Microbiology

I need help writing an outline for what I have written here. I would like to do my assignment of Microbes, more to the point on how microbes help us. When most people think of microbes they think for bad bacteria or the ugly side of what microbes does. I have been researching ...
76. ### precalculus

The function A=A0e^(-0.0099x) models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was put into the vault. If 600 pounds of the material are initially put into the vault, how many pounds ...
77. ### Physics

Two friends are at the local high school track, a circle measuring 440 yards for one complete lap. Abe can jog at 8.2 miles per hour while Bob’s jogging speed is 4.6 miles per hour. If they both start at the same point and jog in the same direction (say clockwise), how many ...
78. ### algebra

Pump A can fill a swimming pool in 6 hours and pump B can fill the same pool in 4 hours. The two pumps began working together to fill an empty pool, but after 40 minutes pump B broke down, and pump A had to complete the job alone. The pool was scheduled to open 4 hours after ...
79. ### Math !-_-

Please help me out. Omg...i absolutley hate math. I try my best but...its just to hard for me. Ok so im working on algebraic expressions. Here i go. 1. The product of a number n and 9 2. The quotient of 21 and a number b I HAD MORE OF THOSE BUT I DID THEM. WOOOOPWOOOP.NOW FOR ...
80. ### biology

what are some Positive/beneficial effects of bacteria on its host
81. ### science

was the bacteria that caused the bubonic plague a unicell or a multicell
82. ### Health

Some examples of diseases/illnesses caused by bacteria?
83. ### Science

What is the reproduction rate of the bacteria species Vibrio Cholerae?
84. ### Biology , AP Biology

which of the following are autotrophs ? A. plants , some protists and some bacteria B. plants C. plants and some bacteria D. plants and some protists
85. ### English

Posted by rfvv on Thursday, December 9, 2010 at 10:03pm. 1. We had to cook the turkey for six hours. 2. We had to cook the turkey in six hours. 3. We had to cook the turkey until six hours. 4. We had to cook the turkey from six hours. 5. We had to cook the turkey after six ...
86. ### Algebra 1

The function A = A0e-0.01386x models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was put into the vault. If 500 pounds of the material are initially put into the vault, how many pounds ...
87. ### Trig

Nathan and Julia are walking along lines that form a 38 degree angle. If Nathan walks at 3.6 miles per hour and Julia walks at 4.1 miles per hour, how far apart will they be after 2 hours?
88. ### Math (just need some help)

A jet ski company charges a flat fee of \$24.00 plus \$2.25 per hour to rent a jet ski. Another company charges a fee of \$23.00 plus \$2.50 per hour to rent the same jet ski. Using a graphing calculator, find the number of hours for which the costs are the same. Round your answer...
89. ### chemistry

The half-life of a reaction was found to be inversely dependent on the concentration of the starting material. Thus, we can say that a. the reaction is zero order b. the reaction is first order c. the reaction is second order d. the reaction starts out first order and changes ...
90. ### chemistry

The half-life of a reaction was found to be inversely dependent on the concentration of the starting material. Thus, we can say that a. the reaction is zero order b. the reaction is first order c. the reaction is second order d. the reaction starts out first order and changes ...

Please check my answer thanks A woman who recently came home from a tropical vaction now has abdominal pain and diarrhea// Her blod test show an elevated eosinophil level. Which of the following organisms is most likely the cause of her illness? A Bacteria B Worm C Virus D ...
92. ### science

Why are models useful? a) models work exactly like the things they present b) Models are the first stage in any experiment c) models are better than charts or graphs d) models are the first step in creating a prototype
93. ### Algebra

A furnace repair service charged a customer \$80 for parts and \$65 per hour worked. The bill totaled \$177.50. About how long did the repair technician work on the furnance? A. 0.5 hour B. 1.5 hours C. 2 hours D. 47.1 hours
94. ### Math Calculus

Hi, can anyone please help me solving these problems? any help will be greatly appreciated 1-If a tank holds 1000L of water, which takes an hour to drain from the bottom in the tank, then the volume V of water remaining in the tank after t minutes is V=1000(1-t/60)^2 0<=t&...

Please see if I Have the right answer thank you for your help . You are asked to change plural medical words to the singular form. Which of the following combinations represents the correct conversion ? A. Criterion, criteria B. Bacteria,bacterium C. Lumen, lumina D. Ganglion...
96. ### Science

Bacteria are classified into 3 basic shapes, name them and give the scientific name. 1. Round pairs - Diplococcus 2. Rod shaped - Bacilli I got 2 can someone help me with one more?
97. ### Math

A fishing boat leaves port at 11 miles per hour at a bearing of 210 degrees for 2 hours, then turns to a bearing of 250 degrees at 8 miles per hour for 4 hours, and finally changes to a bearing of 280 degrees at 7 miles per hour for 2 hours. At this point, the boat heads ...
98. ### Calculus

A manufacturer buys \$280,000 worth of machinery that depreciates linearly so that its trade-in value after 10 years will be \$30,000. Express the value of the machinery (V) as a function of its age (t).
99. ### science check

An elastic object strikes to ground and compress when it touches the ground. What is energy transformation? a- gravitational to electric b- electric to gravitational c- A ---Answer i don't know which one is right for the second one. A study shows treatment of peptic ulcer with...
100. ### Math

(100, 18,000) (200, 37,000) (300, 48,000) (400, 66,000) Write an equation for the line that models the data.