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 12

Algebra 2
Two sailboats are 9.8 miles apart and sailing toward each other. The larger boat sails 4 miles per hour faster than the smaller boat. The two boats pass each other after 0.7 hour. Find the speed of each boat. I cannot figure out for the life of me how to set this one up. I ... 
math
Carrie can inspect a case of watches in 5 hours. James can inspect the same case of watches in 3 hours. After working alone for 1 hour, Carries stops for lunch. After taking a 40 minute lunch break, Carrie and James work together to inspect the remaining watches. How long do ... 
math
Maureen forgets to turn a faucet off. After a minute, 1.5 gallons of water comes out of the faucet. Which equation can bw used to find the number of gallons, g, that comes out of the faucet after 2 hours? A. g= 1.5 x 1/30 B. g=1.5 x 1/120 C. g=1.5 x 120 D. g= 1.5 x 604 
algebra 2
an empty swimming pool is shaped like a rectangular prism with a length of 18 feet and width of 9 feet. Once water begins to be pumped into the pool, the depth of the water increases at a rate of 0.5 foot hour. write a function d(t) that gives the depth in the pool after t hours 
Math
Write a function that represents the situation. Find the balance A in the account after the given time period t. $2000 deposit that earns 5% annual interest compounded quarterly; 5 years A function is A= The balance of the account after 5 years is $_ 
math
Question: The price of a home is $180,000. The bank requires a 10% down payment. After the down payment, the balance is financed with a 30 year fixed mortgage at 6.3%. Determine the unpaid balance after ten years. Answer: The unpaid balance after ten years is $136,641.85 I ... 
math
how do you convert weeks into minutes? my question is, convert 8 weeks into minutes Convert weeks to days, days to hours, hours to minutes. 8 weeks * 7 days/week * 24 hrs/day * 60 minutes/hr = ? Let's break it down. A week has 7 days. A day has 24 hours. An hour has 60 minutes... 
Algebra
Richey Loaner inherited $2105.22 from a notsorich uncle. If Richie deposits his money into an account that pays 3% compounded continuously for t years, then the function A(t)=2105.22e^0.03t gives the account balance after t years. (a) Find Richie’s account balance 6 years ... 
Algebra
The total cost of renting a banquet hall is a function of the number of hours the hall is rented. The owner of the banquet hall charges $85 per half hour up to a maximum of 4 hours plus a $50 cleaning fee. What is the greatest value in the range for this situation? I NEED HELP... 
calculus
Bacterial Population: A bacterial colony is estimated to have a population of P(t)=(24t+10)/(t^2+1) Million t hours after the introduction or a toxin. At what rate is the population changing in 1 hour after the toxin is introduced (t=1)? Is the population increasing or ... 
Math
Home Depot sells compact fluorescent lamps (CFLs) that have a mean life of 10,000 hours with a standard deviation of 1,000 hours. In an order of 8,000 lamps, how many can be expected to last 11,000 hours or longer? 
algebra
Giselle is going to rent a scooter for at least one hour. The fee is $45 plus $5 for each hour it is rented. Write a function rule to describe the total cost of renting a scooter. Find a reasonable domain and range for the function if Giselle has $65. 
Calculus
Find the number of cells present after 9 days given the function: f(x)=111.6e^(.44794t)+288.4 
Science/biology
1) How does alanine differ from glycine? 2) Protein shape can be changed by heat. Egg white is rich in the protein albumin. What happens to egg white when an egg is cooked, and why? 3) Is the shortage of tyrosine the cause of albinism? Explain. 4)Through recumbinant DNA ... 
MATH  solving exponential equations
The halflife of sodium24 is 14.9 hours. A hospital buys a 40 mg sample of sodium24. a) How many grams, to the nearest tenth, of sodium21 will remain after 48 h? b) After how long will only 2.5 mg remain? I don't know how to write the exponential function in order to be ... 
math chart
Julia babysat for the family next door.Below are the hours she worked. Monday:4 hours Tuesday:2 and 1/2 hour Wednesday:1 hour Thursay:1 and 1/2 hour Friday: 3 hours how do i put this information on the chart.the chart looks like this: ________________________ 1 1 1 1 1 1 1 1 1... 
algebra
A rental company purchases a truck for $14,500. The truck requires an average cost of $6.75 per day in maintenance. (a) Find a linear function that expresses the total cost C of owning the truck after t days. C(t) = (b) The truck rents for $55.00 a day. Find a linear function ... 
Algebra
1. –9x – 5 = –95 a) 17 b) 11 c) 10 d) –10 2. x/4 – 5 = –8 a) –27 b) –12 c) –7 d) 12 3. x/5 + 6 = 10 a) 44 b) 30 c) 20 d) –20 4. –2(m – 30) = –6m a) –15 b) –13 c) –8 d) 8 5. 3.75x + 3.7 = 1.7 + 1.75x a) 10 b) –1 c) 1 d) .1 6. –4 – 5(x + 8) ... 
Pre Algebra
Suppose you have an after school baby sitting service. You charge a flat fee of $10 per week plus $3 per hour. The equation y = 3x + 10 represents your earnings per week for one child. Describe the y intercept. Answer: The y intercept is (0,10) but I'm unsure how to describe. ... 
math, algegra
A Freight train is traveling 30 miles per hour. An automobile starts out from the same place 1 hour later and overtakes the train in 3 hours. What was the rate of the automobile? 
fin/370
Firm A had $10,000 in assets entirely financed with equity. Firm B also has $10,000, but these assets are financed by $5,000 in debt (with a 10 percent rate of interest) and $5,000 in equity. Both firms sell 10,000 units of output at $2.50 per unit. The variable costs of ... 
Waste Disposal and Recycling
1. Which of the following types of waste should not be recycled at home? The answer is A: Expired Medicines ____________________________________ 2. Which of the following is NOT a method of disposing hazardous wastes? The answer is D: Disposing of them in sink drains. ... 
Biology
1. Mitochondria and chloroplasts reproduce the same way freeliving bacteria do—by _____________. My answer: Binary fission. 2. The tropism that allows seedlings to find their way out of the soil and into the sunlight is _________________. My answer: Positive tropism. 3. ... 
Math
Lin earns $12 an hour. She wants to buy a new MP3 player. She is considering models that cost at least $84. Writ an inequality that describes how many hours Lin needs to work to be able to buy the player. Explain the answer. 
Algebra
Suppose that a virus doubles every 3 hours. If a person has 30 virus cells, how many will he have after 9 hours? I got 810,000. 30*30=900 900*900=810,000 or would it be 240 since 30*2=60 60*2=120 120*2=240 
Algebra 2. HELP
Furniture Assembly: At the beginning of your 8 hour shift, there were 42 units of furniture that needed assembled. The number of units N that still need to be assembled during your shift can be modeled by n(t)=3t +42 where t is the time in hours... 1. Graph the model 2. What ... 
chemistry
The initial concentration of the a substance was 1.95 M. After 27.72 hours the concentration was 0.9750 M. After anothers 55.44 hours the concentration was 0.4875 M (total time = 83.16 hours). If another experiment were conducted in which the initial concentration was 0.427 M... 
Biology
WHAT IS BACTERIA USED IN!? 
Science
What is an example of bacteria? 
dt
5 types of pathogenic bacteria. thanks! 
bio
what is nonfermentative bacteria? 
math
The function f(t) = 24,500(0.84) models the population of a town t years after 2008. What rate is the population of the town decreasing each year? A. 16% B. 24.5% C. 75.5% D. 84% 
Algebra
following the birth of his son, Ben deposits $35,000 in a college trust fund where interest is 8.9% compounded semiannually. find a function for the amount in the account after t years. 
Finance
Firm A has $10,000 in assets entirely financed with equity. Firm B also has $10,000 in assets, but these assets are financed by $5,000 in debt (with a 10 percent rate of interest) and $5,000 in equity. Both firms sell 10,000 units of output at $2.50 per unit. The variable ... 
math
The equation d=0.12v^2 + 2.1v models the distance d in feet it takes a car traveling at a speed of v miles per hour to come to a complete stop. Graces car was able to stop after 350ft on a highway. If the speed limit in the area was 35 miles per hour, was she speeding? Justify... 
MC science history
Which of the following is not considered part of the "golden age" of microbiology? A.First artificial vaccine is developed B.Gram stain is devised C, Viruses are defined D.all of the above Who determined Archaea are the third domain of life? A.Carl Woese B.Winogradsky C.Kary ... 
math
6. The halflife of a certain radioactive material is 32 days. An initial amount of the material has a mass of 361 kg. Write an exponential function that models the decay of this material. Find how much radioactive material remains after 5 days. Round your answer to the ... 
algebra
you are driving at a speed of 55 miles per hour to your sister's house. at 1pm, you are 150 miles from her house. write an equation that models the distance from you sister's house in terms of the number of hours since 1pm. 
Calc
Set up an exponential function to model each real world situation then use it to find the requested values. The halflife of Carbon 14 is about 5700 years. You begin with 800 grams of this isotope. 1) Function: 2) How much Carbon 14 is there after: a) 11,400 years b) 45,000 years 
science
Which of the following would you most likely find surviving ina boilinghot spring? A) An archaean b)bacteria C)a eukaryote d)none of the above 
English
Which of the following is a compound sentence? A. After it began to rain, he could not find his umbrella. B. They met after work for a game of tennis. C. She liked her neighbors, but she rarely saw them. D. The afternoon meeting extended into the evening hours. A 
English
1. In 3:00 p.m., let's go out. 2. After 3:00 p.m., let's go out. (Which one is right?) 3. In 3 hours, let's go out. 4. After 3 hours, let's go out. (Which one is right?) 5. In 3 hours, he went out. 6. After 3 hours, he went out. (Which one is right?) 
Math
Would 72,060,964,765 look like the following in it's expanded form? 7X 10,000,000,000 + 2X 1,000,000,000 + 0X 100,000,000 + 6X 10,000,000 + 0X 1,000,000 + 9X 100,000 + 6X 10,000 + 4X 1,000 + 7X 100 + 6X 10 + 5X 1 been working on this for 1 hour! 
Math
Matthew is riding a ferris wheel at a constant speed of 2 revolutions per minute. The boarding height for the wheel is 1m, and the radius is 7m. a) What is the equation of the function that describes Matthew's Height in (m) in terms of time in minutes, assuming matthew starts ... 
Math (Basic)
"A woman earns 10.00 per hour at her job, but if she works more than 20 hours in a week she is paid 1.5 times her regular salary for the overtime hours worked. One week her gross pay was 275. How many overtime hours did she work that week? Express your answer in hours to 2 ... 
math
After looking at the results of her calculations, Naomi has decided to aim for $500,000 savings by the time she retires. She expects to have a starting salary after college of $25,000 to $35,000 and she has taken into acount all of the living expenses that will come out of her... 
Physics 2D Collisions
nitially, mass one (2.10 kg) has a velocity of 5.90 m/s and mass two (2.80 kg) is at rest. After they collide, mass one emerges at an angle theta = 33.0 degrees. What is the speed of mass one after the collision if the collision is completely elastic? (Note, there are actually... 
Biololgy
Genetic engineering a. Allows the use of bacteria as production factories for a number of molecules b. Relies of recombinant DNA technology c. Is dependent on RNA enzymes d.Relies completely on conjugation e. a and b 
Algebra
The time, t, required to drive a certain distance varies inversely with the speed, r. If it takes 7 hours to drive the distance at 55 miles per hour, how long will it take to drive the same distance at 65 miles per hour? • about 6.25 hours • about 385.00 hours • about 5.... 
Biology Scientific Method
An experimenter sets out to find out how many hours of sleep a dog needs in order to catch the highest number of balls without a bounce. To test this the experimenter uses 5 dogs in the experiment and allows each dog to sleep a predetermined amount of time: dog 1: 4 hrs, dog 2... 
Physics
Question: A Toyota car travelled at the rate of 70 km/hour leaves the house 2 hours after a Kia car has left and overtakes it in 5 hours. at what rate was Kia car travelling? What's the Formula pls? Thanks 
Physics
Question: A Toyota car travelled at the rate of 70 km/hour leaves the house 2 hours after a Kia car has left and overtakes it in 5 hours. at what rate was Kia car travelling? What's the formula? 
Statistics
A person's level of blood glucose and diabetes are closely related. Let x be a random variable measured in milligrams of glucose per deciliter (1/10 of a liter) of blood. Suppose that after a 12hour fast, the random variable x will have a distribution that is approximately ... 
Algebra
Juan charges $3.50 per hour for babysitting. Write a rule to describe the amount of money (M) earned is a function of the number of hours (h) spent babysitting. HELP PLEASE 
MATH HELP PLEASE I HAVE NEVER BEEN MORE CONFUSED
The value of a car decreases at a constant rate. After 1 year the value of the car is $20,000. After 2 more yearsit is $14,000. Write an equation in slopeintercept that represents the value y (in dollars) of the car after x years. 
Calculus AB
A hiker walks due east for 40 minutes, then changes course by going South 25 degrees West. After 20 minutes, he changes course again, this time at South 75 degrees East. He goes through this path for one hour after which he heads north reaching his final destination in 15 ... 
Physics or Math
Question: A Toyota car travelled at the rate of 70 km/hour leaves the house 2 hours after a Kia car has left and overtakes it in 5 hours. at what rate was Kia car travelling? what's the formula pls? 
math
how do you make a coordinate plane for the function of a person who weighs 130 pounds that burns 300 calories in 1 hour,600 calories in 2 hours,900 calories in 3 hours and 1200 calories in 4 hours 
math
aladder attached to the side of a ship has ten rungs each one foot apart visible above the water if the water level rises 1.5 feet per hour how many rungs will be visible after 3 hours 
Physics
Question: A Toyota car travelled at the rate of 70 km/hour leaves the house 2 hours after a Kia car has left and overtakes it in 5 hours. at what rate was Kia car travelling? 
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 was the temperature at noon? (also write an equation) 
Math
The table below represents the velocity of a car as a function of time: Time (hour) x Velocity (miles/hours) y 0 50 1 52 2 54 3 56 Part A: What is the yintercept of the function, and what does this tell you about the car? Part B: Calculate the average rate of change of the ... 
maths
Two planes take off from the same airport at the same time. One plane travels on a bearing S 12degreeW at 400 miles per hour. The other plane travels on a bearing N 75degreeE at 300 miles per hour. How far are the planes from each other 3 hours after takeoff? 
pre calc
Suppose you get on a Ferris Wheel that has a diameter of 40 meters and turns at a rate 1.5 revolutions per minute (the period is not 1.5 ) the height above the ground in meters, of your seat after t minutes can be modeled by an equation. Assume you get on the ride at t=0 min ... 
math
2.Two cars leave Kansas City at the same time. One car is moving east and the other west. After 5 hours, the cars are 575 miles apart. One car is traveling 15 miles per hour faster than the other. Let S = the speed of the slower car and F = the speed of the faster car. If one ... 
algebra
The number of boxes on a truck varies directly with the time since the workday began. At 3 hours after the workday began, there are 207 boxes on the truck. How many boxes should we expect there to be on the truck 7 1/3 hours after the workday began? 
business math
After looking at the results of her calculations, Naomi has decided to aim for $500,000 savings by the time she retires. She expects to have a starting salary after college of $25,000 to $35,000 and she has taken into account all of the living expenses that will come out of ... 
business math
After looking at the results of her calculations, Naomi has decided to aim for $500,000 savings by the time she retires. She expects to have a starting salary after college of $25,000 to $35,000 and she has taken into account all of the living expenses that will come out of ... 
math 208
parking in a student lot cost 3.00 for the first half hour and 1.25 for each hour there after a partial hour is change the same as a full hour what is the longesr time that student can park 
math
The graph shows the cost C in dollars to rent a car for one day as a function of the number m of miles driven. Which of the following functions models the situation? 
ALGERBRA 2
rosalyn works no more than 25 hours a week during the school year. she is paid $12 an hour for tutoring geometry and $8 an hour for delivering pizzas for Pizza King. she wants to spend at least 2 hours but no more than 7 hours a week tutoring. find rosalyns maximum earnings. 
Math: Algebra II
You start 50 miles east of Pittsburgh and drive east at a constant speed of 65 miles per hour. (Assume that the road is straight and permits you to do this.) Find a formula for d, your distance from Pittsburgh, as a function of t, the number of hours of travel. 
Math: Algebra II
You start 50 miles east of Pittsburgh and drive east at a constant speed of 65 miles per hour. (Assume that the road is straight and permits you to do this.) Find a formula for d, your distance from Pittsburgh, as a function of t, the number of hours of travel. 
PreAlgebra
1. Given the function rule f(x) = x² – 3x + 2, what is the output of f(–2)? 2. Suppose you earn $12 each time you mow the lawn. Write the function describes the relationship between your total earnings E and the number of times you mow the lawn, m? 3. Mia charges $2.25 ... 
math
A bacteria population is currently exactly one million and increasing at a linear rate of 15 per second. What will the population be in two weeks? 
Algebra
Riley uses the equation y = 10x to calculate the amount of money he earns after working x hours. The table below shows the amount of money Mandy earns after working different numbers of hours. Hours Worked Amount Earned 9 $81 12 $108 15 $135 Which statement is true? 
Biology
The original high estimate of the number of proteincoding genes in humans was based partly on the number of different known proteins made by the human organism. How can the small number of genes now thought to be present account for this larger number of proteins synthesized ... 
calculus
A man starts walking north at 2ft/s from a point P. Twentyfive seconds later a woman starts walking south at 3ft/s from a point 400ft due east of P. At what rate are the people moving apart 50 seconds after the woman starts walking? Do not include units in your answer. 
math
A company produces three types of color TVs: Models X, Y and Z. Each model X requires 2 hours of electronic work and 2 hours of assembly work. Each Y model requires 1 hour of electronic work and 3 hours of assembly work. Each model Z requires 3 hours of electronic work and 2 ... 
math
A company produces three types of color TVs: Models X, Y and Z. Each model X requires 2 hours of electronic work and 2 hours of assembly work. Each Y model requires 1 hour of electronic work and 3 hours of assembly work. Each model Z requires 3 hours of electronic work and 2 ... 
math
Jill has a total of 12 1/2 hours of football practice after school five days a week. a. How many hours of practice will he have for 15 school days? I think the answer is 37 1/2 hours. b. How many hours of practice will he have for 22 school days? I think that the answer is 55 ... 
accounting
. Preference Decisions: NPV vs. IRR vs. Profitability Index Stephens Industries is contemplating four projects: Project P, Project Q, Project R, and Project S. The capital costs and estimated after tax net cash flows of each project are shown in the table that follows. ... 
math a little less
celia writes the equation d=8t to represent the distance in miles d that bikers could travel in t hours at a speed of 8 miles per hour. make a table that shows the distance traveled every half hour,up to 5 hours if bkikers ride at this constant speed. how far would bikers ... 
math
substitute to find the value of the expression. A train must cover a distance of 2398 miles. The velocity, in miles per hour, of the train is where t is the time,in hours, to complete the trip. If the train completes the trip in 22 hours what is it's velocity? A) 109 miles per... 
Algebra
To attend a family reunion, Beth drives 100 mi from Fresno and Clara drives 220 mi from San Jose. Both women drive the same speed in miles per hour, but Clara's drive takes 2 hours longer than Beth's. Find the length of Beth's drive. a. 1 hour. b. 2.2 hours c. 1.66 hours d. 3.... 
physics
1.Turner’s treadmill starts with a velocity of −2.4 m/s and speeds up at regular intervals during a halfhour workout.After 23 min, the treadmill has a velocity of −7.0 m/s. What is the average acceleration of the treadmill during this period? Answer in units of m 
PoE
Turner’s treadmill starts with a velocity of −1.9 m/s and speeds up at regular intervals during a halfhour workout.After 36 min, the treadmill has a velocity of −7.6 m/s. What is the average acceleration of the treadmill during this period? Answer in units of m/s2 
physics
Turner’s treadmill starts with a velocity of −2.9 m/s and speeds up at regular intervals during a halfhour workout.After 23 min, the treadmill has a velocity of −7.9 m/s. What is the average acceleration of the treadmill during this period? Answer in units of m/s2 
biology
how many chromosomes do bacteria have? 
science
how does Bacteria get rid of waste? 
Health
what type of bacteria is streptocoque 
Biology
Which of the following depends on bacteria? 
Biology
What are pathogenic and opportunistic bacteria? 
progra
how would i be able to write a function module for average from this pseudocode and then use it to write an algorithm. Sum integer Num integer Count integer Count:= 0 Sum:=0 Dowhile count <3 Println “Enter Num: ” Read Num Sum := Sum + Num Count:= count + 1 ENDDO ... 
Finite Mathematics
You invested $25,000 into two accounts: one that has simple 3% interest, the other with 2% interest. If your total interest payment after one year was $600, how much was in each account after the year passed? 
Calculus
I am not too sure if I did this question correct. Thanks in advanced! Data table: Time after Consumption (min): 30 60 90 120 150 180 Amount of Codeine in Blood (mg): 27.0 23.5 21.2 18.7 16.6 14.5 1.) create a scatter plot of the data and determine a suitable equation to model ... 
Calculus
I am not too sure if I did this question correct. Thanks in advanced! Data table: Time after Consumption (min): 30 60 90 120 150 180 Amount of Codeine in Blood (mg): 27.0 23.5 21.2 18.7 16.6 14.5 1.) create a scatter plot of the data and determine a suitable equation to model ... 
Math:)
The data in the table represents the average number of daylight ours each month in Springfield in 2015, rounded to the nearest quarterhour. Jan~9.5 hrs Feb~10.5 hrs Mar~12 hrs Apr~13.25 hrs May~14.5 hrs Jun~15 hrs Jul~14.75 hrs Aug~13.75 hrs Sep~12.5 hrs Oct~11 hrs Nov~9.75 ... 
Biology
a. Identify each statement as an observation, hypothesis, or prediction. b. Are the groups of statements below examples of an inductive or deductive process. 1. Male red winged blackbirds display red wing patches to signal superior to other males. Answer: Hypothesis/deductive... 
Algebra (math)
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 was the temperature at noon?