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 98

STATISTICS
True or False? A researcher is interested in studying whether there is a correlation of IQ with health. For this purpose he selected a sample of 261 people and asked them to complete two questionnaires: one for IQ and one for health. After evaluating the questionnaires each ... 
Algebra HELP!
I cannot find an example and am confused about what to do with this problem. Can someone tell me what they want? Do they want me to graph the function and determine x&f? I am just not sure how to get my answer. My problem is: Compare the graph of the given quadratic function f... 
science(physics)
A car goes from a dead stop to 25m/s in 5s going east. It keeps going then slows down after it reaches 60m/s. It is being drived on level ground. For the first 5s the magnitude of the velocity vector increases at a constant rate. What is the Instantaneous velocity of the car ... 
Algebra
Two multipedes are cantering through a shopping mall when they come to a sock shop.They count up all their feet and find that three dozen or 36 socks will be just enough to keep all of their feet warm. If one of them has eight more than the other , how many feet does each ... 
Bussiness
ABC Company has 50,000 employees at it headquarters. The company wants to increase employee productivity by setting up internal software application training program for it employees. The training program will teach employees how to use Microsoft software programs such us ... 
Data analysis
Question 1 Production Rates A manufacturing company wishes to find out whether the productivity of its workforce has increased now that they have a new machine. The factory examined the records for a random sample of 8 hours over the past month. The hourly production rates for... 
Data analysis
Question 1 Production Rates A manufacturing company wishes to find out whether the productivity of its workforce has increased now that they have a new machine. The factory examined the records for a random sample of 8 hours over the past month. The hourly production rates for... 
Algebra
Ann sleeps 8 hours per night. Write an expression for the number of hours Ann sleeps in n nights 
physics
A space vehicle is coasting at a constant velocity of 20.5 m/s in the +y direction relative to a space station. The pilot of the vehicle fires a RCS (reaction control system) thruster, which causes it to accelerate at 0.390 m/s2 in the +x direction. After 49.0 s, the pilot ... 
physics
A space vehicle is coasting at a constant velocity of 21.1 m/s in the +y direction relative to a space station. The pilot of the vehicle fires a RCS (reaction control system) thruster, which causes it to accelerate at 0.380 m/s2 in the +x direction. After 41.0 s, the pilot ... 
Business Math
Suppose that in a monopoly market the total cost per week of producing a high tech product is given by C(x) =3600+100x+2x^2. Suppose further that the weekly demand function for this product is p=5002x. Find the number of units that will give the break even points for the ... 
programming
Write a C++ code to count the number of characters, words, and lines entered by the user. The program stops if the user enters two dots. 
Math
Jake bought a car for $15,000. Each year the value goes down by 30% of its value the previous year. Write the expression that gives the value(V) after (t)years. 
Math
A rocket is launched at t=0 seconds. Its height, in feet, above sealevel, as a function of time,t, is given by h(t)=16t^2+112t+480 When does the rocket hit the ground after it is launched? 
Math
A rocket is launched at t=0 seconds. It's height, in feet, above sealevel, as a function of time, t, is given by h(t)=16t2+64t+192 When does the rocket hit the ground after it is launched? 
prealgebra/ check answer please
John who is an amateur golfer spends 3 hours every day practicing golf. What percentage of his waking hours does John spend practicing golf if he sleeps 9 hours a day? 249=15 3/15= 0.2 0.2 x 100 = 20% spent practicing 
College Algebra
Flight of a Ball If a ball is thrown upward at 96 feet per second from the top of a building that is 100 feet high, the height of the ball can be modeled by S(t)=100 + 96t 16t^2 feet, where t is the number of seconds after the ball is thrown. How long after the ball is thrown... 
algebra
The equation y=1777x+27,153 can be used to predict the number y of gun deaths in the United states x years after 2000, that is, x=0 corresponds to 2000, x=2 corresponding to 2002, x=4 corresponds to 2004, and so on. Predict the number of gun deaths in 2004 and 2008. In what ... 
algebra
the equation y=1777x+27,153 can be used to predict the number y of gun deaths in the united sttes x years after 2000, that is, x=0 corresponds to 2000,x2 corresponds to 2002, x=6 corresponds to 2006, and so on. predict the number of gun deaths in 2006 and 2007. in what year ... 
Fahrenheit 451
Reread these lines from the text, “No we’ll save what we can, we’ll do what there is left to do. If we have to burn, let’s take a few more with us. Here! He remembered the books and turned back. Just on the off chance.” What future event in the story do these words ... 
Physics
A wheel starts from rest and rotates about its axis with constant angular acceleration. After 8.7 s have elapsed, it has rotated through an angle of 20 radians. I found that the angular velocity at 8.7 s is 4.60 rad/s. What is the angular acceleration of the wheel? What is the... 
comparing fractions
at Morris Elementarhy there are 45 students in each grade, four though six. In the fourth grade, 19 participate in sports after school. Two out of every six fifth grade play sports after schoo;. In the sixthgrade class, seven of every ten students are not playing sports. ... 
Algebra II
last 2 for tonight Express log6(19) in terms of common logarithms. Then approximate its value to four decimal places. Answer: log19/log6=1.6433 In a certain area, the sale price of new singlefamily homes has increased 4.1% per year since 1992. If a house was purchased in this... 
Math
The next morning, Kevin meets with a client who would like to invest $20,000 into an account that pays 3.2% interest, which is compounded annually. How much money is in the account after 5 years if no withdrawals or additional deposits are made? 
algebra
By the end of your 5th French lesson, you have learned 20 vocabulary words. After 10 lessons you know 40 vocabulary words. Write an equation that gives the number of vocabulary words you know, y, in the terms of the number of lessons you had, x. 
physics
A small fish is dropped by a pelican that is rising steadily at 0.60 m/s. After 2.8 s, what is the velocity of the fish? The acceleration of gravity is 9.81 m/s2. How far below the pelican is the fish after the 2.8 s? 
Balance Sheet
Use the following information to complete the balance sheet (1) The company was organized on January 1, 2005, and has operated for the full year 2005. (2) Earnings have amounted to $275,000, and dividends of $70,000 have been paid to stockholders. (3) Cash and accounts ... 
Physics
A freezer has a coefficient of performance of 6.30. It is advertised as using 486 kWh/yr. Note: One kilowatthour (kWh) is an amount of energy equal to running a 1kW appliance for one hour. a) On average, how much energy does it use in a single day? I got 4.79 x 10^6 J (b) On... 
Chemistry
Consider a cell at 255 K: line notation PbPb2+(1.27M)Fe3+(2.29M)Fe Given the standard reduction potentials calculate the cell potential after the reaction operated long enough for Fe3+ to have changed by 1.432M? I know that Fe3+ is the cathode which will decrease in ... 
Chemistry
Consider a cell at 255 K: line notation PbPb2+(1.27M)Fe3+(2.29M)Fe Given the standard reduction potentials calculate the cell potential after the reaction operated long enough for Fe3+ to have changed by 1.432M? I know that Fe3+ is the cathode which will decrease in ... 
Chemistry
Consider a cell at 255 K: line notation PbPb2+(1.27M)Fe3+(2.29M)Fe Given the standard reduction potentials calculate the cell potential after the reaction operated long enough for Fe3+ to have changed by 1.432M? I know that Fe3+ is the cathode which will decrease in ... 
Chemistry
Consider a cell at 255 K: line notation PbPb2+(1.27M)Fe3+(2.29M)Fe Given the standard reduction potentials calculate the cell potential after the reaction operated long enough for Fe3+ to have changed by 1.432M? I know that Fe3+ is the cathode which will decrease in ... 
Chemistry
Consider a cell at 255 K: line notation PbPb2+(1.27M)Fe3+(2.29M)Fe Given the standard reduction potentials calculate the cell potential after the reaction operated long enough for Fe3+ to have changed by 1.432M? I know that Fe3+ is the cathode which will decrease in ... 
math
Lucy is supposed to subtract a certain number from 48 and divide the result by the same number. However, she divided 48 by the same number and subtracted the number from the quotient giving an answer of two. What should be the correct answer? 
statistics
Number sampled is 1,000 and mean is 7.2 on a scale from 110 how do I determine standard deviation. Can we answer this with using the sampling distribution of the sample proportion? 
math
In a storm, a plane flew against the wind and took 9 hours to cover 3,600 miles. The return trip, traveling with the wind, took 1 hour less. find the air speed of the plane, and the speed of the wind. 
Physics
A parallel plate capacitor with plate separation d is connected to a battery. The capacitor is fully charged to Q Coulombs and a voltage of V. (C is the capacitance and U is the stored energy.) Answer the following questions regarding the capacitor charged by a battery. For ... 
Math
A monopoly has a total cost function C = 1000 + 108x + 12x^2 for its product, which has demand function p = 324 − 3x − 2x^2. Find the consumer's surplus at the point where the monopoly has maximum profit. (Round your answer to the nearest cent.) 
algebra
A grandmother is looking for a plan to finance her new grandchild’s college education. She has $25,000 to invest. Search the internet and locate a longrange investment plan, CD, Savings Bond, etc, for the grandmother. The plan is to earn compound interest. Calculate the ... 
Corporate law
At a closing at 10 a.m. on May 3, 2005, X Corp. delivers $25,000,000 to the seller of a factory using $20,000,000 from Bank One secured by a mortgage on the property, and the attorney for X Corp. records its title to the property at the same time. At 2 p.m. the same day, X ... 
Finance
A wealthy donor endows a chaired professorship. If the interest rate is 8% how much must he set aside to provide the following end of year salary payment alternatives? a. $100,000 per yr for 20 yrs b. $100,000 per yr in perpetuity c. A perpetuity that pays $100,000 for the ... 
math
Solve the problem. A cruise boat travels 48 miles downstream in 3 hours and returns upstream in 6 hours. Find the rate of the stream. 
algebra
Minute hand of a clock is 10 inches long. how far does the tip of the minute hand move in 15 seconds? I got that=5 pi BUT What speed is it moving in miles/hr???? algebra  PsyDAG, Sunday, November 13, 2011 at 1:38am Assuming it does move 5 pi, convert 5 * 3.1416 = 15.7 inches ... 
statistics
A leading company chemically treats its product before packaging. The company monitors the weight of product per hour that each machine treats. An SRS of 90 hours of production data for a particular machine is collected. The measured variable is in pounds. (a) Using the data ... 
Algebra
1. A man completing a 40km trip finds that by travelling one more km per hour, he could have made the journey in 2 hours less time. At what speed did he actually travel? 2. One pipe alone can fill a tub in 6 minutes less than it takes a second pipe alo e to fill the same tub. ... 
maths
A ship travels at a constant speed of 25 kilometers per hour (kph) in a straight line from port A located at position (xA, yA) = (−100,−100) to port B at (xB, yB) = (300, 100). (a) (i) Find the equation of the line of travel of the ship. (ii) Find the direction of ... 
algebra 2 A
Unit 5: Quadratic functions and equations. I need help with the Firework display portfolio?? Fireworks Display Portfolio ALGEBRA 2 A: QUADRATIC FUNCTIONS AND EQUATIONS Directions: You are part of a fireworks crew assembling a local fireworks display. There are two parts to the... 
Econ Help if you can :P
Approximately 14 million Americans are addicted to drugs and alcohol. The federal government estimates that these addicts cost the U.S. economy $300 billion in medical expenses and lost productivity. Despite the enormous potential market, many biotech companies have shied away... 
Math
The cost of producing x units of a certain commodity is given by P(x)=1000+ int(MC(s))ds from 0 to x, where P is in dollars and M(x) is marginal cost in dollars per unit. A. Suppose the marginal cost at a production level of 500 units is $10 per unit, and the cost of producing... 
Physics
A student sits on a rotating stool holding two 3.4kg objects. When his arms are extended horizontally, the objects are 1.0 m from the axis of rotation and he rotates with an angular speed of 0.75 rad/s. The moment of inertia of the student plus stool is 3.0 kg · m2 and is ... 
ap physics
A student sits on a rotating stool holding two 3.8kg objects. When his arms are extended horizontally, the objects are 1.0 m from the axis of rotation and he rotates with an angular speed of 0.75 rad/s. The moment of inertia of the student plus stool is 3.0 kg · m2 and is ... 
Physics Momentum
A 170g cue ball is moving at 3.0 m/s when it strikes a 160g stationary numbered ball (object ball). After the collision the balls move off as shown. Determine the speed of the cue ball and the numbered (object) ball after the collision. The diagram illustrates the cue ball ... 
statistic
The accounting department at Weston Materials, Inc., a national manufacturer of unattached garages, reports that it takes two construction workers a mean of 32 hours and a standard deviation of 2 hours to erect the Red barn model. Assume the assembley follow the normal ... 
English, please help
I'm having a brain freeze. Is this sentence right: "Dad, you promise to come watch me in the play, right" said Ryan? I forget does the ? go after right and a period after Ryan. Thanks 
Math ~CHECK MY WORK~
With stars are my answers. Please check them if they are wrong please tell me the right ones. Number 1 (the bottom one) I don't get it so please help me with that one please! 1) You have $60 in your wallet and want to buy some new CDs. If the CDs are $11 each, what number of ... 
Physics
Two objects collide and bounce off one another. After the collision, object m1 = 1.67 kg moves off at 14.5 m/s at a heading of 327 degrees. Object m2 = 1.66 kg moves off at 8.9 m/s at a heading of 211 degrees. Initially, m2 was traveling at 11.8 m/s at a heading of 318 degrees... 
Algebra
That is not what the ? is asking. The ? is asking about how to get the quotient function, not the composite as you solved for. Can you please show us how to get the quotient function solution? Thanks! I need to find the Quotient Function of the following: Given that f(x)=x^23... 
Biology
I don't understand how to do this at all!! I've been Googling the past hour and I just don't get it. My teacher won't respond and my exam is tomorrow. I get that we cleave with an acid and then we can do amino acid analysis. The entire protein can be pieced together only after... 
English
I selected 5 sentences as promised. I really hope the others were correct! Sentence number 6 refers to the Italian grading system which I don't know how to express in English. 1) During the break I go out in the courtyard.We aren't allowed to smoke or run in the corridor. 2) I... 
math
f(x)=(x+1)^32 1. Describe the long term behavior of this function. Give the power function that f resembles. 2. Determine the number of turning points f has. 
economics
Karen can make 15 wristbands and only three pot holders in one hour. Anna can make 12 wristbands but 2 potholders in one hour. What is the opportunity cost of a pot holder? Who has a comparative advantage in the production of pot holders? 
Math
3. A fish and game warden captures and tags 66 deer in a local forest. A month later he captures 100 deer and that 17 of them are tagged. Estimate the actual number of deer in the forest. A) 149 B)1,022 C) 578 D) 389*** 4. Lucy wants to find out the number of frogs in a pond ... 
Math
A merchant makes two raisin nut mixtures. Each box of mixture A contains 9 ounces of peanuts and 2 ounces of raisins, and sells for $2.80. Each box of mixture B contains 12 ounces of peanuts and 4 ounces of raisins, and sells for $4.00. The company has available 5,000 ounces ... 
mangement science the art of modeling w/ spreadshe
Five years ago, an automobile manufacturer started offering an extended warranty to buyers of its sportutility vehicle.Â Â The extended warranty covered defects occurring after the initial threeyear warranty expired.Â Â Of the 10,... 
College Economics
Assume that it takes four hours of labor time to paint a room and three hours to sand a floor.If all 24 hours were spent painting, how many rooms could be painted by one worker? If a decision were made to sand two floors, how many painted rooms would have to be given up? ... 
physics
A man stands on his balcony, 120 ft above the ground. He looks at the ground, with his sight line forming an angle of 50 degrees with the building, and sees a bus stop. The function d = 120 sec θ models the distance form the man to any object given his angle of sight &#... 
MATH
Two planes leave an airport at the same time, one flying east, the other flying west.The eastbound plane travels 100 mph slower. They are 3040mi apart after 4hrs. find the speed of each plane 
Accounting help
I'm trying to make an income statement...for sales revenue out of this information what do I add up? Sales Revenue Forecast: June (actual) 24,000 July (actual) 20,000 August 28,000 September 52,000 October 44,000 November 76,000 December 96,000 January 22,000 February 32,000 ... 
Anthropology
In what way would the role of the Western culture anthropologist be different from another culture's anthropologist? 
Math
A bike rental charges a $4.00 rental fee plus $2.25per hour. Selena paid $12.00 to rent a bike. How many hours did Selena rent the bike for? I can't figure out how to round the answer 4+2.25x=12 4 4 2.25x= 8 2.25 2.25 X= 3.555555555555555 
Algebra
2. Tub A contains 12% apple cider. Tub B contains 55% apple cider. How many ounces of cider from each tub must be gotten to make a 64 ounce drink that is 20% apple cider? 3. Mary is running to school. She leaves home at 7:00 AM trotting at a speed of 12 mph. Her little lamb ... 
Calculus  another question
"Find the absolute minimum value of the function f(x) = x ln(x)". I know that one of the critical values is 1 (domain restriction). Am I right? So I did the derivative, and got 1+ ln(x), but I cannot figure out the critical values, because ln(x) can't equal 1... Am I doing ... 
math
Distance between 2 villages A and B is 165km.a scooter rider starts from A to B at 75km at speed of 320km/hr.at the same time another scooter rider starts from B towards A at speed of 25km/hr.find when they will cross each other? ( 10 am)? 
Math
after a cyclist has gone 2/3 of her route, she gets a puncture in a tire. Finishing on foot, she spends twice as long walking as she did riding. How many times as fast does she ride as walk? I know that the answer is 4 but do not know how to get to this answer. Can you please ... 
accounting
P134A The following financial information is for Inca Company. INCA COMPANY Balance Sheets December 31 Assets 2007 2006 Cash $ 70,000 $ 65,000 Shortterm investments 55,000 40,000 Receivables 104,000 90,000 Inventories 230,000 125,000 Prepaid expenses 25,000 23,000 Land 130,... 
Inflection and concavity
Consider the function f(x) = 2 x + 3 x ^ { 1 }. Note that this function has no inflection points, but f''(x) is undefined at x=B where B= 6/x^3(my answer) For each of the following intervals, tell whether f(x) is concave up (type in CU) or concave down (type in CD). (\infty... 
Health
1.Antibiotics can be used to cure which of the following diseases? A) the flu B) mononucleosis C) strep throats D) hepatitis 2.Athlete's foot is caused by______. A) a fungus < my answer B)swimming pools C) bacteria D) a virus 3. Colds and the flu are spread through______. A... 
College Algebra
A cars value is declining exponentially. The car is currently 3 years old and has a value of 18,000. The car sold for 26,000 brand new. Find the rate at which the value of the car is decreasing. So far my equation is 18,000=26,000 (3.04)^the But I'm not sure if that is right 
Physics... Help!
A bullet of mass m=0.060 kg hits a 5.0 kg block with an initial speed of 225 m/s. The block is connected to a spring that is attached to a wall. The friction between the block and the table is negligible. Upon impact, the bullet bounces back from the box with a speed of 75 m/s... 
Alegebra
Can some one please help me with this 3 problems I have a hard time with probabilities I'm studying for my midterm. Thank you 1) Urn A has balls numbered 1 through 7. Urn B has balls numbered 1 through 5. A ball is selected at random from urn A and then a ball is selected at ... 
ALGEBRA
The function h=t^2 +95 models the path of a ball is in the air. assuming the boy lives at sea level where h=0 ft, which is a likely place the boy could have been standing when he threw this ball? a. his backyard b. an underground cave c. a ladder d. a bridge 
Math
At the peak of a roller coaster ride, a rider's sunglasses fly off his head. The height h (in feet) of the glasses, t seconds after he loses them, is given by h = 16t2 + 16t + 1152. After how many seconds will the glasses hit the ground? 
Honors World History
The U.S. had two constitutions/government after the revolution,the Articles of Confederation and the Constitution. How many has France had by the end of the section? Which country do you think was more stable after their revolutions,France or the United States? 
Physics
Well it's an kinematics project and it involves alot of questions. So here goes the problem: Suppose a football was thrown at an angle of 37 degrees with a velocity of 90mi/hr while leaving a quarterback hand at a height of 6'4" above the ground. A)Calculate the maximum height... 
accounting
Perez Company began operations in 2009. Since then, it has reported the following gains and losses for its investments in trading securities on the income statement: 2009 2010 2011 Gains (losses) from sale of trading securities $ 15,000 $(20,000) $ 14,000 Unrealized holding ... 
physics
A particle A of mass 2kg lies on the edge of a table of height 1m. It is connected by a light inelastic string of length 0.7m to a second particle B of mass 3 kg which is lying on table 0.25m from the edge. If A is pushed gently so that it starts falling from table then, find ... 
algebra
A company produces doll houses and sets of doll furniture. The doll houses take 3 hours of labor to produce, and the furniture sets take 8 hours. The labor available is limited to 400 hours per week, and the total production capacity is 100 items per week. Existing orders ... 
Physics
A youngster shoots a bottle cap up a 15.0° inclined board at 1.92 m/s. The cap slides in a straight line, slowing to 0.95 m/s after traveling some distance. If the coefficient of kinetic friction is 0.35, find that distance. I still get 0.315 m as the answer, but it's ... 
Chemistry
You have 100.0 mL of 0.2500 M solution of NaCl sitting in a beaker. After several days you test the solution and find out that it is now 0.3721M. How much water must have evaporated?? I got 67.2 mL but its the wrong answer.. PLS HELP! 
Physics  please check my answer
A man tosses a ball upward. It reaches its highest point after 25 seconds. Find its initial velocity. Alright, so I tried solving this. I used the equations (let v = initial velocity): h = v^2 / 2g , and h = (v*t)  (1/2)(g)(t^2) and I got 101.48 m/s. Is this correct? 
statistics
Identify the conditions of the independent variable , the dependent variable , their scales of measurement , which measure of central tendency and variability to compute and which scores you would use in the computation . We test whether participants laugh longer ( in seconds... 
Math.
1. At 4:00 A.M. the outside temperature was 28. By 4:00 P.M. it rose 38 degrees. What was the temperature at 4:00 P.M.? 10 2.Three friends decided to exercise together four times a week to lose fat and increase muscle mass. While all three were healthier after six weeks, one ... 
TURNER
SUPPOSE PAYMENT WHERE MADE AT THE END OF EACH MONTH INTO AN ORDINARY ANNUNITY INTEREST AT THE RATE OF 4.5%/YEAR COMPOUNDED MONTHLY. IF THE FUTURE VALUE OF THE ANNUNITY AFTER 13 YEARS IS $65,000 WHAT WAS THE SIZE OF EACH PAYMENT 
Math
Janice is running a 7613 meter race. Assume the she runs at a constant speed of 287 meters per minute. Express the function f(t) that gives her distance from the finishing line t minutes after the start of the race. 
Functions
Janice is running a 7613 meter race. Assume the she runs at a constant speed of 287 meters per minute. Express the function f(t) that gives her distance from the finishing line t minutes after the start of the race. 
Math
Last one! Please help! South America's total population was 515,000,000 and the world's total population was 6,279,000,000. What percentage was South America rounded to the nearest tenth? 
Calc
Hello! Really can't wrap my head around this so please help! Consider the function: f(x) = x^2+(1000x)^2 First find out where it is increasing, and then use this fact to determine which number is larger: a) 1000^2 or b) 998^2 + 2^2 I found that the function increases at x=500... 
Macroeconomic
An increase in the capital stock will: A. Shift production function downward. B. Shift the production function upward C. Flatten the production function D. Steepen the production function The answer is B? 
math
If 3 people worked and earned $5554.52 in one day. How much does each person earn if one worked for 5 hours, the other worked 7 and the other worked 8 hours? 
Physics
A force of 40 N is applied at an angle of 30oabove the horizon to a 5 kg block that is at rest on a rough horizontal surface. After the block starts to move with an acceleration of 3 m/s2, what is the coefficient of kinetic friction between the block and the horizontal surface...