# 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?

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## math / science

a bacteria population doubles every eight minutes. if the population begins with one cell how long will it take to grow to 512 cells? -
## calc

At what rate is the amount of material growing if bacteria in a sample increases to 250 when the sample is observed for 150 minutes? -
## Math

Rick works two jobs to pay for college. He tutors for $20 per hour and also works as a bag boy for $7 per hour. Due to his class and study schedule, Rick is only able to work up to 25 hours per week but must earn at least $200 per week. If t represents the -
## Biology

What causes mutations in bacteria? and Can mutations affect plasmids? -
## Calculus

The rate of growth dP/ dt of a population of bacteria is proportional to the square root of t with a constant coefficient of 9, where P is the population size and t is the time in days (0¡Üt¡Ü10). The initial size of the population is 700. Approximate -
## accouting

Harris Fabrics computes its predetermined overhead rate annually on the basis of direct labor-hours. At the beginning of the year, it estimated that 37,000 direct labor-hours would be required for the period’s estimated level of production. The company -
## Algebra

Manny works 40 hours per week. He must work for his parents where he earns $8 per hour. He also works for a computer company where he earns $20 per hour. What is the minimum number of hours Manny can work for the computer company to earn a total of $464 -
## algebra

the temperature at Kent is -7 degrees and increasing at 2.5 degrees per hour. The temperatire at row is 19 degrees decreasing at 4 degrees per hour. When will they be the same? and what temperatore? let t = hours running time. -7+2.5t = temperature at Kent -
## algebra

Tickets to a concert are available online for $25 plus a one time handling fee of$1.75 the total cost is a function of the number of tickets bought what function rule models the cost of the concert tickets evaluate the function for 6 tickets answers -
## SQL for business help

I have no idea where to begin with this. A SQL statement that creates a user defined function that returns an int value is needed. This int return value is obtained by deducting the lowest Count field value from the highest Count field value of the Part -
## consumer math

Rufus works an average of 46 hours each week. He gets paid $5.70 per hour and time-and-a-half for all hours over 40 hours. What is his annual income? -
## Economyst re-post

Looks like the formual dropped the exponents when I posted it, I've fixed that below....does this make any more sense? I'm not sure I have the formulas correct for this problem and I do not know what the labor hours are.... Dimex Company, a sheet-metal -
## Cost Accounting

A company’s sales volume averages 4,000 units per year. Recently, its main competitor reduced the price of its product to $48. The company expects sales to drop dramatically unless it matches the competitor's price. In addition, the current profit per -
## geometry

Find a function that models the area A of a circle in terms of its circumference C. -
## Algebra

Erin has three more dimes than nickles and twice as many quarters as dimes. she has a total of $5.05 How many of each type of coin does Erin have 5.05= 2q-d-3d-n A Piece of rope that is 63 meters long is cut into three pieces such that the second piece is -
## MICROBIO

What is Calcium Chloride (CaCl2) used for transformation on bacteria and antibiotics? http://www.genome.ou.edu/protocol_book/protocol_adxF.html it is a study of a branch of biology where we come to know about the world of microrganisms. -
## Microbiology

Live cultures of Bacillus thuringiensis (Dipel) and B. subtilis (Kodiak) are sold as pesticides.What bacterial structures make it possible to package and sell these bacteria? For what purpose is each product used? -
## Biology

what enzyme do bacteria se to break down starches? List the three protozoan kingdoms. Which of thse kingdomsdo the slime molds belong to? what is the unique mode of reproduction that is characteristic of the scyphozoans? -
## Cost accounting

each bill 1500 hours per year and receive pay of $100,000 each. Four paralegal work for the firm and each receives pay of $40,000 and works 2,000 hours per year. Overhead of $396,000 is anticipated, of which $300,000 is attorney support, and the rest is -
## Precalc

okay sorry last two questions! I promise! The sun always illuminates half of the moon’s surface, except during a lunar eclipse. The illuminated portion of the moon visible from Earth varies as it revolves around Earth resulting in the phases of the moon. -
## statics

A store clerk filing an order for 17 models of a new smart-phone inadvertently pulled some older models and included them in the order. There are 25 new models and 12 older models in stock when the clerk filled the order. Determine the probability that the -
## Geometry

Ann went on a 10 hour bicycle trip. The graph models the relationship between the time and the total distance traveled by Ann. The table shows selected points on the graph. T=0,1,4,7,10 d(t)=0,3,5,5,10 draw a graph of anns speed in mph in terms of the time -
## Calculas

suppose m(0) milligrams of a drug are put in the blood of an injection. The amount of drug t hours after the injection is given by m(t)=m(o)e^-kt, for t (=>) 0, where k is the rate constant, which is related to the half life. we also treat oral -
## CALCULUS PLEASE HELP!!

suppose m(0) milligrams of a drug are put in the blood of an injection. The amount of drug t hours after the injection is given by m(t)=m(o)e^-kt, for t (=>) 0, where k is the rate constant, which is related to the half life. we also treat oral -
## Science

Help please! Nitrogen-fixing bacteria in soil turns nitrogen gas into _____. ammonia oxygen water carbon dioxide Please help! -
## Biology

Hi, I was looking at phylogenetic trees and I was wondering, how do u root the universal tree of life? Like for eukurya, archea, abd bacteria.. how do we know where to put the root? thanks! -
## math help

Enrique charges $5 for every 1/5 hour he spends walking dogs. In the morning he walks Buttons for 2/5 hour, Bruno for 1/5 hour, and Pepper for 3/5 hour, Monday through Friday. On Saturdays he takes Mimi, Diva, and Coco to the dog park for 4/5 of an hour. -
## Math

1. Find two numbers whose sum is 84 and one number is 18 more than the other. Answer: 84-18=2x x=33 84+18=2x x=51 2. A board 125 inches long is to be cut into two equal parts so that one part is 4 inches less than twice as long as the other part. Find the -
## math

If you usually burn after 1/2 hour expose to sun, you can lenghten the time you are in the sun to three hours by applying SPF number 6. how long could a person who burns after 1/4 hour stay in the sun using SPF 15 lotion? -
## Calc 1

Consider the function below. f(x) = (x^2)/(x−9)^2 (a) Find the vertical and horizontal asymptotes. x=? y=? (b) Find the interval where the function is increasing. (Enter your answer using interval notation.) Find the interval where the function is -
## math

5. A bus on a regular schedule takes 3 1/4 hours to reach its destination. The express bus takes 2 1/2 hours to make the same trip. How much travel time can be saved by taking the express? A. 1 1/4 hours B. 3/4 hour C. 2 hours D. 5 3/4 hours it C right? -
## math

melinda charges $4 per hour for babysitting. Mrs Garden does not want to spend more than $25 for babysitting. what is the maximum number of hours that she can have melinda babysit. the answer is $24. solve the inequality -
## algebra 1

Mrs. Hernandez owns a computer training business. She charges a lab fee plus an hourly fee to train office workers on various software programs. It costs $265.00 to attend a 6-hour course and $345.00 for an 8-hour course. Which equation relates x, the -
## statistics

Section 5.3: Normal Distributions: Finding Values Answer the questions about the specified normal distribution. Q1: The lifetime of ZZZ batteries are normally distributed with a mean of 265 hours and a standard deviation ó of 10 hours. Find the number of -
## science

An average human heart rate is 70 beats per minute. How many times it beats over 70 year lifetime? use scientific notation. 365 = the number of days in a year 70 years /1 * 365 days / year = 25,550 25,550/1 * 24 hours/ day = 613,200 613,200/1 * 60 minutes/ -
## Programming

Declare Integer count For count=1 to 3 Step 2 Display count End For What would the output be? -
## English

Is traffic a count or non count word? I think its non count. And is highway a count or non count word? -
## math

Can you explain to us if we have the functions c(t) = 3t + 2, where c is the cost in dollars of t hours of tutoring and t(m) = m2 - 1 where t is hours of tutoring and m is the number of minutes tutored, what the input and output values would be of the -
## SCIENCE

John Ryther developed a model aquaculture farm at the Woods Hole Oceanographic Institution that obtained nutrients from __________. I'm not certain whether the answer is sewage, bacteria or algae. Someone please help. His 1st raw ingredient is treated -
## Math

It costs $20 plus $1.50 per hour to rent a golf cart. Find an equation showing the relationship between the cost of renting a cart (y) and the number of hours it was rented (x)???? Plz I really don't understand this -
## Algebra I

Please show me how to solve: The value of a $20,000 car decreases every year, t. The equation below models this situation: 20000(1-0.04t)=13,000. After how many years will the car be worth $13,000. Round to the nearest tenth if necessary. -
## algebra

A motorist drove for 2 hours at one speed and then for 3 hours at another speed. He covered a distance of 252 km. If he had traveled 4 hours at the first speed and one hour at the second speed, he would have covered 244 km. Find the speeds. -
## Math

The owner of a luxury motor yacht that sails among the 4000 Greek islands charges $430 per person per day if exactly 20 people sign up for the cruise. However, if more than 20 people (up to the maximum capacity of 90) sign up for the cruise, then each fare -
## math

The owner of a luxury motor yacht that sails among the 4000 Greek islands charges $430 per person per day if exactly 20 people sign up for the cruise. However, if more than 20 people (up to the maximum capacity of 90) sign up for the cruise, then each fare -
## math

The owner of a luxury motor yacht that sails among the 4000 Greek islands charges $430 per person per day if exactly 20 people sign up for the cruise. However, if more than 20 people (up to the maximum capacity of 90) sign up for the cruise, then each fare -
## math

The owner of a luxury motor yacht that sails among the 4000 Greek islands charges $430 per person per day if exactly 20 people sign up for the cruise. However, if more than 20 people (up to the maximum capacity of 90) sign up for the cruise, then each fare -
## algebra

A company that manufactures bikes has a fixed cost of $8,000. It cost $800 to produce each bike. The total cost for the company is a sum of fixed cost and variable costs. Write the total cost, C, as a function of the number of bikes produced x then find -
## Math-Pre-Calc

Suppose that Mr. X will be giving away a golden homework pass to one student in each class. The recipient of this pass is excused from homework all year. He has developed a unique system for determining who will get the pass. 1. First, he wants all -
## Math College 115

A hiker can walk 2 miles in 43 minutes. What is his average speed in miles per hour? Round your answer to two decimal places. The hiker's average speed is ___ miles per hour. What formula can be used to find the distance travel, d, in miles in t hours? -
## math

a messenger traveling 65 miles per hour pursues a truck which has a start of 2 hours and overtakes it in 3 hours. find the truck speed. -
## Math

Shelby drove to her aunt's house, which is 360 miles away. If it took her 5 hours and she drove at a constant rate, what was Shelby's average speed? My answer which I figured out in two different ways: 360 miles/5 hours=72 mph 360 miles/5 hours=x/1 hour=72 -
## MAT 116

A moon is about 210,000 miles from the planet it orbits. Write in scientific notation. If a rocket traveled at 3 x 10^4 miles per hour, how long would it take for it to reach the moon from the planet? Write the number 210,000 in scientific notation. 210,00 -
## 11th grade

Yesterday Lucy walked 2 hours and 1/2 jogged hour and covered 6.25 miles. Today she walked for 3 hours and jogged for 1 hour and covered 10.25 miles. Assuming a constant walking rate and a constant jogging rate, how fast did she walk and how fast did she -
## algebra...redo.

Yesterday Lucy walked 2 hours and jogged 1/2 hour and covered 6.25 miles. Today she walked for 3 hours and jogged for 1 hour and covered 10.25 miles. Assuming a constant walking rate and a constant jogging rate, how fast did she walk and how fast did she -
## 11th grade-Calculas

The number of hours of daylight D depends upon the latitude and the day t of the year and is given by the equation : D(t)=12+Asin(((2pi)/(365))(t-80)) where A depends only on the latitude (and not t). for latitude 30 degress, A is about 2.3 1. When is the -
## Math

School is out at 3:50 pm. Band practice is 2 1/2 hrs dinner takes 3/4 of an hour homework takes 1 1/4 hrs. You have to go to bed at 10. About how much time is left to play video games? A. 3 1/2 B.5 hours C.1 hour D. 2 hours D? -
## accounting

Given the cost of direct materials of $500 and the labour rate of $20 per hour. Assuming the predetermined overhead rate is $5 per hour and the actual hours is 50 hours - please calculate the total cost of this job? -
## Math

5. Raul works 2 hours a day after school, Monday through Friday. On Saturdays he works 8 hours at $2 more per hour than on weekdays. If he makes $142 per week, how much does he make per hour on weekdays. -
## math

It takes mary x hours to travel 100 kilometers. If she increases her speed by 5 kilometers per hour, the journey will take her 3 hours less time. Find x. -
## math

Find a function that models weekly profit in terms of price per feeder. -
## Pre Cal

An airplane travels due west for 2.5 hours at 340 miles per hour. Then it changes course to S51°W. Find the airplanes distance from its point of departure and its bearing, after a total flight time of 4.5 hours. -
## astronomy

2. We ultimately want to find the amount of solar energy that hits the observer on the planet. Energy is usually measured in Joules, but there are other appropriate units of energy as well; kilowatt-hours for example, are used to measure the amount of -
## Stats

Exercise 6-8 The Downtown Parking Authority of Tampa, Florida, reported the following information for a sample of 235 customers on the number of hours cars are parked and the amount they are charged. Number of Hours Frequency Amount Charged 1 18 $3 2 33 7 -
## Math

18. Carla earns $8.43 per hour working 40 hours a week. If she worked 7 overtime hours one week, what would be her earnings? $396.21 $366.74 $425.75 19. Lauren earns $3.75 per hour as an usher. In 5 days her tips were $19.75, $25.30, $18, $21.50, and -
## would someone please check this math

1 four buttons have diameters of 5/8 , 3/4, 9/16, and 7/8 which buttons is smallest? answer 9/16 2. I spent 1/3 of my time doing math homework and 2/7 preparing for a history test . what fraction of study time remain? answer: 13/21 3. least common multiple -
## Chemistry

Assume electricity cost 15 cents kw per hour....using the energy requirements.what is the per gram cost of energy to produce Na + AL? Useful info: 2NaCL --> 2Na + CL2 around 600 degree C; 14 KJ per g Na. Al- 2Al2O3-->4Al+3O2 1000 degrees C; 30 KJ per -
## capital cost

Supplier A has old equipment that produces at the rate of 10,000 per hour. Supplier B has equipment that produces at the rate of 20,000 per hour and supplier C has new equipment that produces at 40,000 per hour. You need 60,000 pieces. Each supplier uses -
## math

The Thompson Company uses standard costing and has established the following direct material and direct labor standards for each unit of Lept. Direct materials: 2 gallons at $4 per gallon Direct labor: 0.5 hours at $8 per hour During September, the company -
## Accounting

The following data relate to direct labor costs for the current period: Standard costs 6,000 hours at $12.00 Actual costs 7,500 hours at $11.60 What is the direct labor rate variance? Answer A.$15,000 unfavorable B.$3,000 favorable C.$17,400 unfavorable -
## calculus

Coroners estimate time of death using the rule of thumb that a body cools about 2 degrees F during the first hour after death and about 1 degree F for each additional hour. Assuming an air temperature of 78 degrees F and a living body temperature of 98.6 -
## S.S. 1 question

5. What did delegates decide about how the number of representatives for each state would be determined? a. Each state would get a number of representatives directly proportional to its population. b. Each state would get a number of representatives -
## Math

How do I solve this question? "Rory Gilmore earns $20 per hour during the week and $30 per hour for overtime on the weekends. One week Rory earned a total of $650. She worked 5 times as many hours during the week as she did on the weekend. Write and solve -
## Statistics

We are given this table which is Benford law for these questions they are used for filling your taxes: k= p(X=k) 1 0.301 2 0.176 3 0.125 4 0.097 5 0.079 6 0.067 7 0.058 8 0.051 9 0.046 1.) If you select two numbers randomly from any where on your taxes -
## Math

A girl earns $6.00 an hour when she works Monday through Friday and $9.00 an hour on Saturday. Last week, her salary was $273 for 42 hours of work. How many hours did she work on Saturday? -
## Biology!

Inorganic fertiliser is applied each year to fields bordering a lake. the fertiliser runs off into the lake and causes six changes which altogether make the fish die. 1. aerobic bacteria feed on dead plants 2. algae reproduce faster 3. light cannot -
## Math

The following table represents a grouped frequency distribution of the number of hours spent on the computer per week for students. What percentage of students used the computer between 7 and 14.9 hours per week? Round your answer to one decimal place, if -
## algebra

the number of gallons of water,y,after x hours maybe modeled by the linear equation y=800-50x. Which of the following statements is true, a.it is filling at a rate of 800 gallons per hour/b.it is filling at a rate of 50 gallons per hour/c.it is emptying at -
## Math(HELP!)

The concentration of a medicine, f(x) in parts per million, in a patient's blood X hours after the medicine is taken is given by the function f(x)= -x^4 +12x^3 -58x^2 +132x. 1.) How many hours after the medicine is taken will it be eliminated from the -
## precal

Write a formula for converting hours, starting with midnight as zero, to a decimal number of degrees. Assume that a full day equals 360º, 60 minutes equals one hour, and 60 seconds equals one minute. Use x, y, and z to represent hours, minutes, and -
## intro to computer programming

I need help with my Java homework! Write a program that calculates a customer's monthly bill. It should ask the user via dialog box to enter the letter of the package the customer has purchased (A, B, or C) and the number of hours that were used. It should -
## Japanese

okay....so in my Japanese class right now, we're currently writing our speeches.. So far, I've come up with: (This is actually in Japanese but I've chosen to write this in English as I'm on a school computer which only allows English characters!) "At -
## Math 201

The pricd of a home in CA was $100,000 in 1985 and rose $160,000 in 1997. a. create two models, f(t) assuming linear growth and g(t) assuming exponential growth, where t is the number of years after 1985. *round coefficient to three decimal places when -
## please check my answer

please check my answer thanks :) You are the manager of The Candle Shop using the FIFO method of inventory pricing, what is the dollar value of the ending inventory if there were 17,000 units on hand Dec 31 Show all of your work Jan 1 5,000 @ $0.89 Feb15 -
## icd-9 cpt

preoperative u/a-- can't locate the CPT codes for blood epithelials, WBC, RBC, Bacteria, casts and crystals-- I have searched and at a loss where to go Please assist Thanks -
## Kayla

The Symbiotic relationship between rhzobium bacteria and the roots of plants in the legume family is an example of what? A. Symbiosis B. Nutrient storage C. Nutrient Absorption D. Anchorage E. Support -
## Biology

Bacteria produce yogurt from milk by (a) conjugation (b) aerobic respiration (c) fermentation (d) fixing nitrogen I'm missing school for a week so I need help with a few Biology problems. -
## science

There are many drugs that aid our lives on a daily basis that are made/mass produced due to the assistance of bacteria. Can you give a few examples of such drugs and perhaps tell a little about the process? -
## Science

Humans developed antibiotics to fight bacterial infections. However, some antibiotics are no longer efective in killing the bacteria they once killed. How does the theory of evolution explain this? -
## math

Write the following number in standard form: 400,000,000+30,000,000,+1,000,000+200,000+5,000+600+1 -
## math

why are bacteria bad at math? its a worksheet. -
## science

Are bacteria one-celled or two-celled microbes? -
## OSCM

Develop a production plan and calculate the annual cost for a firm whose demand forecast is fall, 10,000, winter, 8,000, spring, 7,000 and summer 12,0000. Inventory at the beginning of fall is 500 units. At the beginning of fall you currently have 30 -
## math

An airplane flew for 6 hours with a 22km/hour tailwind. The return flight against the same wind takes 8 hours. Find the speed of the plane with no wind and windspeed. -
## Math

complete the equation for the linear function whose graph contains the points (2,5) and (3,0) y - ____ = _____(x -2) *fill in the blank - not sure how to do this question cleaning company charges a fee of $65 in addition to $10.50 per hour of cleaning.. x -
## calculus

The number of hours of daylight D depends upon the latitude and the day t of the year and is given by the equation : D(t)=12+Asin(((2pi)/(365))(t-80)) where A depends only on the latitude (and not t). for latitude 30 degress, A is about 2.3 1. When is the -
## math

Suppose the total cost function for manufacturing a certain product C(x) is given by the function below, where C (x) is measured in dollars and x represents the number of units produced. Find the level of production that will minimize the average cost. -
## math

Suppose the total cost function for manufacturing a certain product C(x) is given by the function below, where C (x) is measured in dollars and x represents the number of units produced. Find the level of production that will minimize the average cost. -
## FIU

(1)You are preparing a budget for the month of January and are trying to estimate maintenance cost for the month. The maintenance cost is an overhead cost that is categorized as being mixed – that is it has both a fixed and a variable component. To -
## Algebra

1. Evaluate. (8 – 3) (12 ÷ 2 • 2) – 20 Answer: I'm not sure if its -5 or 40 2. 6x – 7 = 5(x – 2) Answer: -3 3. Solve for y. 3x – 2y = 12 Answer: 3x-12/2 4. Solve. –3(x – 3) + 8(x – 3) = x – 9 Answer: 1 1/2 or 1.5 5. Find the slope of -
## Finance Math

Maggie Vitteta, single, works 40 hours per week at $13 an hour. How much is taken out for federal income tax with one withholding exemption? (Assume the overtime for each employee is a time-and-a-half rate after 40 hours.) (Round your answer to the nearest