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?
237,434 results, page 95

MATH
A ship sails north, then turns 45° in a clockwise direction. After another hour, it turns clockwise 90°. In which direction is the ship now sailing? 90 + 45 = 135° west? 
intermediate math
angie and payton jog of opposite each other and angie can jog 4.5 mile faster than payton. after 1.5 hours they are 17 miles apart. how much can each person jog 
Physics
A hotair balloonist, rising vertically with a constant velocity of magnitude v = 5.00 m/s, releases a sandbag at an instant when the balloon is a height h = 40.0 m above the ground. After it is released, the sandbag is in free fall. For the questions that follow, take the ... 
Physics 1
A hotair balloonist, rising vertically with a constant velocity of magnitude v = 5.00 m/s, releases a sandbag at an instant when the balloon is a height h = 40.0 m above the ground. After it is released, the sandbag is in free fall. For the questions that follow, take the ... 
Algebra II
Write the simplest polynomial function with the zeros 2i, square root of 5, and 2. I know that the conjugates are 2+i and the square root of five, but when I multiply it comes out wrong. not sure A toy rocket is launched from the ground level with an initial vertical ... 
mathprecalculus
A person starts walking from his home. First, he goes 2 miles north and 3 miles west to a park. After spending the afternoon at the park, he walks 1 mile west and 4 miles south to a bar. How far is the bar from his home? 
Math Please Help Me
Henry spends the day at a ski resort. The total trip riding up the main chair lift and skiing down his favorite trail takes 40 to 50 minutes, depending on whether Henry takes a rest along the trail. He gets on the first chair lift at 8:00 am, he takes a onehour lunch break ... 
science
15,000,000 blood cells are destroyed every second to make room for new blood cells how many blood are destroed every hour 
linear/exponential
This question involves the halflife formula. In this exercise, we are to give a halflife for an exponentially decaying quantity. Need answer to the following: The halflife of a drug in the bloodstream is 4 hours. By what factor does the concentration of the drug decrease in... 
Algebra
A runner starts at the beginning of a cross country course running at a constant rate of 6 miles per hour. Five minutes later a second runner begins at the same point, 
Accounting
Case study 2 Sailmakers Ltd John Jeffries recently left the army after more than 20 years in the service. He had decided that at 45 years of age it was time to start a second career. Throughout most of his life John had a passion for yachting and had competed successfully in ... 
calculus
Do I just put in 3 for t? A ball is dropped from a tower 550 meters above the ground with position function s(t) = 4.9t2 + 550. What is the velocity of the ball after 3 seconds? 
Algebra 1
A ball is thrown into the air with the in initial upward velocity of 60 ft/s. It's height (h) in feet after t seconds is given by the function h= 16t^2+60t+6. What will the height be at t=3 seconds? 
Algebra
A ball is thrown into the air with an initial upward velocity of 60 ft/s. Its height (h) in feet after t seconds is given by the function h = –16t² + 60t + 6. What will the height be at t = 3 seconds? A) 3 B) 4***** C) 5 D) 6 
Calculus
Zoe purchased a house in 1999 for $196,000. In 2004, she sold the house and made a net profit of $80,000. Find the effective annual rate of return on her investment over the 5year period. (Round your answer to the nearest hundredth of a percentage point.) 
finite math
Georgia purchased a house in 1998 for $220,000. In 2003 she sold the house and made a net profit of $50,000. Find the effective annual rate of return on her investment over the 5yr period. Please round the answer to the nearest tenth of percent. 
statistics
A group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time students spent studying per week. Assuming a population standard deviation of 6 hours, what is the required sample size if the error should be less than ½ ... 
Math
easton enjoys playing football at recess. He spends 1/4 of an hour at recess each day. How many hours does he spend at recess in a 5 day week? My Equation: 24x5=120 120/1x1/4=120/20=60 Other Equation: 1/4x5/1=5/4=1 1/4 WHICH ONE IS RIGHT?? 
math
how many microseconds are in a minute. A microsecond is one millionth of a second there are 60 seconds in a minute. So 60 times one million is what? or (60)(1,000,000)=? got it thank you so much.. 
Science
1. A corn plant over the course of a summer can weigh 500 grams (dry biomass, after removing the water), yet it starts from a seed that weighs less than 1 gram. What is the primary source of this increased mass? What process(es) are responsible for the gain in mass? Explain. 2... 
math
The amount of Sandy earns from babysitting is proportional to the number of hours she works. She earns 45 dollars is 6 hours. what is the hourly rate of Sandy`s earnings? 
Physics
A 79.4 kg bobsled is pushed along a horizontal surface by two athletes. After the bobsled is pushed a distance of 7.1 starting from rest, its speed is 4.7 m/s. Find the magnitude of the net force on the bobsled. Answer in units of N. 
help please :)
When is the best time to read review or discussion questions? A. Immediately after you have finshed all of the reading. B. After you write your notes. C. Before you begin any details reading. D. Throughout your detailed reading. i got A what do you think? 
PreCalculus
The exponential function y(x)=Ce^ax satisfies the conditions y(0)=6 and y(1)=7. (a) Find the constants C and a. Enter the exact value of a. (b) Find y(2). Enter the exact answer. Simplify the answer so it does not contain any logarithms. 
math
After looking at the results from questions 1, and 2. Seth realizes that a 2% return in a certificate of deposit will never allow him to reach his goal of $1 million in 10 years. Presuming his apartment will indeed be worth $400,000 in 10 years, compute the future value of ... 
Math
You plan to make 24 equal quarterly payments (payments are at the end of each period) into an account to pays 8% (per year compounded quarterly). If you need $5,000 at the end of 10 years (i.e. 4 years after the last payment is made into the account), how much would you have ... 
nursing/dosage
The health care provider prescribed the adjustment of the IV hourly rate based on the nasogastric tube (NGT) output q4h (every 4 hours) for a client who had abdominal surgery yesterday. From 12:00pm to 4:00pm the NGT output was 240ml and the IV was infused at a rate of 100ml/... 
elementary school math
Which of the following symbols could you use to complete this number sentence? Explain your reasoning. .= + < #  > 7,000+800+9. 7,000+900+8 
Math
Actually, i made a mistake. All though we still came up with the right answer, I made a mistake and copied another book answer to another question into this question. The real book answer to this word problem is: ( Let's translate the English into Math: x+3x=60, so x=15 and ... 
math
in 2005,Eastside elementary school was built at a cost of $18,000,000.the school it replaced was built in 1935 at the cost of $180,000.explain how the values of the 8 in each number are related. 
MATH
in 2005,Eastside elementary school was built at a cost of $18,000,000.the school it replaced was built in 1935 at the cost of $180,000.explain how the values of the 8 in each number are related 
MATH
in 2005,Eastside elementary school was built at a cost of $18,000,000.the school it replaced was built in 1935 at the cost of $180,000.explain how the values of the 8 in each number are related 
Math 6b
You roll a number cube twice. Find P(even then not 2). Write the probability as a fraction in simplest form. I don't know the answer to this one but I'm just asking for the process so I can solve it. 
MATH
Im Struggling with this assignment here. Would like help ASAP. Consider following situation.. You are going to buy this laptop at $1294.00 plus HST. You can also pay $50 a month for 30 months with down payment of $100. Compare following 3 scenarios using spreadsheets to ... 
alg.
1. You are planning to spend no less than $6,000 and no more than $10,000 on your landscaping project. a) Write an inequality that demonstrates how much money you will be willing to spend on the project. b) Suppose you want to cover the backyard with decorative rock and plant ... 
Calculus
The demand function for a bottle of hand lotion is p(x)=0.78+0.0003x, where x is the number of bottles sold and p is the price, in dollars. The cost function is c(x)=4800.32x+0.0005x^2. Find the marginal profit when 700 bottles of hand lotion are sold. 
Math
The first prize in a lottery is $250 000. Each winner chosen after the first is paid 20% as much as the winner before them. Determine a formula for the sum of n terms of the geometric sequence. 
physics
Bobo jumps out of a plane 2,000 m in the air. If Bobo has a mass of 100 kg, how much kinetic energy will he have after falling for 200 m? Assume no air resistance. 
geometry
the teacher: 15 seconds after the buzzer, the teacher has 135 meters to go to the finish line. 32 seconds after he left the starting line, the teacher has to run 50 meters more to the finish line. Usain Bolt: 22 seconds after the buzzer, usain has 189 meters to finish. 36 ... 
algebra
On the day a child was born, a lump sum P was deposited in a trust fund paying 6.5% interest compounded continuously. Use the balance A of the fund on the child's 29th birthday to find P. (Round your answer to the nearest cent.) A = $5,000,000 P = $1 
prealgebra
a pottery studio gives threehour and fivehour classes for $41.00 an hour. The studio collects 6,437 for 41 classes. How many 3 hour classes and how many five hour classes were paid for? 
Help pleaseEnglish
How would you punctuate this sentence correctly? Little Rock Arkansas was the scene of tragedy and strife. Should I place a comma after the word Arkanas? Should I place a comma after the word tragedy? Comma after Little Rock and another comma after Arkansas. http://grammar.ccc... 
economics
When the price of X is $1 and the price of Y is $1 and income is I, Joe Panther spends $100 on good X. One day Joe is walking down Downer street and is dismayed to discover that the price of good X has increased to $2. However, moments later Joe is delighted to find a $100 ... 
math
what is the square root of 5z2, then it says plus 7=10 First, subtract 7 from each side so you now have: sqrt(5z2)=3. Then square each side, so you now have: 5z2=9. Then add 2 to each side so you have 5z=11. Then divide each side by 5 and the answer is z=11/2. thanks ... 
algebra
Express the amount of material needed to make a can as a function of the radius. In other words, find a function A(r) such that A represents the surface area (in square inches) of the cylinder and r is the radius (in inches). my answer (not sure) A(r) = r^2 + 2r + 29 ? 
physics
A solid aluminum sphere has a radius of 2.28 m and a temperature of 89.1 °C. The sphere is then completely immersed in a pool of water whose temperature is 11.9 °C. The sphere cools, while the water temperature remains nearly at 11.9 °C, because the pool is very large. The ... 
physics
A solid aluminum sphere has a radius of 2.28 m and a temperature of 89.1 °C. The sphere is then completely immersed in a pool of water whose temperature is 11.9 °C. The sphere cools, while the water temperature remains nearly at 11.9 °C, because the pool is very large. The ... 
WorldHistory
Check? What are the three ways that civilization in western Europe declined after the Roman Empire fell? Answer: 1. All government stopped and didn't exist after the fall of Rome. The society fell apart . 2. Because of no government there was no army for protection and there ... 
math
Giita walks 2 1/2 miles in one hour. How much time does it take her to walk 7miles. Round the answer to the nearest second. 
economics
After 17 vehicular accidents two years ago in a given intersection, the mayor of Boulder proposed to reduce the number of crashes by making improvements at the intersection. Assuming the appropriate CRF is 0.53, what will be the reduction in number of crashes at that ... 
English
I still have a few doubts on some sentences. I really hope you can have a look at them. 1) You have to go (?) through the metal detector. 2) Nature was an instrument of God (but not "an The English Renaissance was less connected to (not with) the visual arts. 3) During this ... 
healthcare finance
Suppose that a clinic has thirdparty payer revenues of $10,000 a day. On average, it takes the clinic 50 days to collect from its payers. What will be the steady state receivables balance? a. $ 10,000 b. $ 50,000 c. $250,000 d. $500,000 e. $750,000 
Physics
A projectile (mass = 0.17 kg) is fired at and embeds itself in a target (mass = 2.84 kg). The target (with the projectile in it) flies off after being struck. What percentage of the projectile's incident kinetic energy does the target (with the projectile in it) carry off ... 
calculus
At the indicated point for the function, find the following. A graphing utility's numerical derivative feature can be used to check your work. y = (x3 + 2x)3 at x = 3 (a) Find the slope of the tangent line. (b) Find the instantaneous rate of change of the function. 
Coordinated Sciences (chem)
Hi guys, so we recently did a lab where we put a strip of Magnesium Carbonate in a crucible with a lid on, weighed it and then put it over a bunsen burner for a while to let it oxidise. After that, we weighed it again. Here are my results: Crucible + Lid =34.07g Crucible + Lid... 
Math
The table shows the number of volunteers that work at a radiothon for different numbers of hours . How many volunteers can be expected to go to work for 9 hours? 
English
Hi! ____ Ms. Kemp Recruits Volunteers As a new ninth grader at my high school, I was sitting in an assembly about volunteerism. The guest speaker was Ms. Francis Kemp. Today I had an experience worth writing about. I must admit that I did not have high hopes for the hour. I ... 
Trigonometry
Evaluate the inverse trigonometric function. Give your answer to the nearest degree. (Enter only the number.) cos^1 (1) 
world news
Is there anywhere I can look for 1: how eastern thought/philosophy affets the eastern nations/culture 2: what our western world is like in relation to eastern culture and how eastern thought is starting to leak into our wesstern culture 3: how the eastern thought in the west ... 
Chemistry
2HCr4 + 3HS03 + 5H+ > 2Cr3+ + 3SO4^2 + 5H20. At t=0, 0.0249 mols of HCr04 are loaded in to 250ml of solution. After 1/10 of an hour, 0.00852 mol of HCrO4 remain. Assuming the solution volume remained the same, how many grams of water were formed per second during this... 
English
1. Only after he had lost his health did he realize the importance of it. 2. Only after he had lost his health, did he realize the importance of it. 3. Only after he had lost his health, he realized the importance of it. 4. Only after he had lost his health he realized the ... 
College Algebra
Part 1: Measure the distance of the diagonal (from one corner to the opposite corner) of the screen on your computer monitor to the nearest tenth of a centimeter or sixteenth of an inch. Measure the height of the screen along the vertical as well. Use the Pythagorean theorem ... 
Law
I'm stumped... I've gone through my book three times now and can't find this information. Can someone please help me? First... Which of the following is true of a voidable contract? A: It's valid to only one party. B: It's good for only a short period of time. C: It's based on... 
7th grade math
After 1 hour,Jon had finished 5/9 of a longdistance race, and Ling had finished 7/9 of it. At that time, who had finished a greater fraction of the race, and by how munch. 
english
I just need something to get me started. Do you know of a Cultural Symbol or a Cultural Tradition I can write about. I've been trying to do this project for weeks and I do not know what to do. I know it's easy, but I can't find what it;s asking. please help. This may help: ... 
Confused about how this is worded?
I'm having a hard time trying to understand what my teacher and the article I read are saying here? Could you put it into easier words for me? For the West, "A house was a capital investment, perhaps the prototype for all fixed capital investment, an assertion of culture in ... 
Math
Two numbers have a sum of 32. One of the numbers is t. Find the other number. My answer is: 32t. Is this correct? 
Function Graphs
How do use a graph to find a particular function value like y=f(x).Find 2? Also, how do you use a graph to determine the function's domain and range? 
7th grade Math
A space probe is 7.62 x 10 to the 7th power kilometers from the surface of the planet Mars. If the space probe is traveling towards mars at a arate of 127 meters per second, how many hours will it take the probe to reach the surface of the plant? Round to the nearest hour. ... 
statistics
Estimate the multiple linear regression equation relating number of cups of coffee per week, female sex, and number of hours of exercise per week, considered simultaneously, to GPA. Consider GPA the dependent, or outcome variable. my answer: GPA= 7.301 1.649 (female sex) 0.... 
physics
A 120kg tackler moving at 5 m/s meets headon (and tackles) a 80kg halfback moving at 5 m/s, after which they couple together. What will be their mutual speed after the collision? Hint: use conservation of momentum law for INELASTIC collision. 
CHEMISTRY..
*What are the products after a single replacement rxn? *Determine the spectator ion(s) and the net ionic equation. F2(g) + AlBr3(aq)>? After single replacement....Br2 is a liquid, not a solid so ppt will not form..hence, there is no reaction? 
Programming Logic and Design (help?)
Design a retirement planning calculator for Skulling Fincancial Services. Allo a user to enter a number of working years remaining in the user's career and the annual amount of money the user can save. Assume that the user earns three percent simple interest on savings ... 
Math
Meg concludes that students spend a mean of 7 hours in school each day. Tara thinks the mean is 6 hours. Who is correct—Meg or Tara? Explain your answer in two or three sentences. Make sure to use facts to support your answer 
Peninsula college
Wendy is traveling 120 miles away from chasity. They are traveling towards each other. If chasity travels 4 mph faster than Wendy and they meet after 4 hours, how fast was each traveling? 
statistics
The number of independent errors in a transmitted message of n symbols follows a Binomial distribution. The probability of an error in transmission is .001. If 2,000 symbols were sent, a) Find the expected number of errors. b) Write out the formula for the distribution of ... 
math
you have 2 positive numbers. One number is onefifth of the other number.The difference between the two numbers is 152, find the numbers. 
precalculos
The cost C of producing x thousand calculators is given by the following equation. C=15.2x^2+15,990x+580,000(x≤175) Find the average cost per calculator for each of the following production levels. 40,000; 60,000 and 175,000 
another para
Before dawn, on our eight day at sea, the head smuggler of the rickety boat announced to my father, that we were just off the coast of the Florida Keys and that we should jump. I clearly remember him saying: Go! Swim! the man said and sped off. After a halfhour of swimming, ... 
Physics
A dockworker applies a constant horizontal force of 90.0Nto a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 12.0min a time of 5.20s.If the worker stops pushing after 5.20s, how far does the block ... 
Am. History
During the 1820's and 1830's a distinct American culture began to emerge. what was this called? I think it is American Popular Culture. 
math
If you tend to be one of those people who taps their foot, picks their nails, drums their fingers, or moves around in their seat, there may be some good news. Although your fidgeting may be annoying to others, researches at the National Institute of Health reports that one of ... 
math
If you tend to be one of those people who taps their foot, picks their nails, drums their fingers, or moves around in their seat, there may be some good news. Although your fidgeting may be annoying to others, researchers at the National Institute of Health reports that one of... 
chemistry
If 10L each of propane and oxygen are combined at the same temperature and pressure, which gas will be left over after reaction? What volume of that gas will remain? The answer is 8 L of Propane Tried for a while but I don't understand how answer books answer is 8L of Propane. 
Physics
An object is launched horizontally with a velocity of 12 m/s. What is the vertical component of velocity after 2s? What are the coordinates of the object after 4s? 
chemistry
an insoluble precipitate was formed when a solution of 1.000 L of 0.750 M sodium carbonate (Na2CO3) was mixed with .5000 L of 1.50 M solution of iron (III) nitrate (Fe(NO3)3). what is the concentration of all ions present after the reaction is complete? 
Math
One fourth of herd of goats was seen in the forest. Twice the square root of the number of the herd had gone up the hill and the remaining 15 goats were on bank of the river. Find the total number of goats. I got the equation to be x/4 + 2 root x + 15 = x but didn't get the ... 
math
Two functions, A and B, are described as follows: Function A y = 9x + 4 Function B The rate of change is 3 and the yintercept is 4. How much more is the rate of change of function A than the rate of change of function B? 2 3 6 9 I believe the answer is either C or B but I am ... 
math
Two station astronauts will each perform three 8hour EVAs within 13 days to repair a damaged solar panel that was impacted by a micrometeoroid on the space station. What is the total amount of oxygen needed by the two astronauts to accomplish this? Please put your answer in ... 
Word Problem
A UPS employee, Davis, packs and labels three types of packages: basic packages, business packages, and oversized packages. Business packages take a priority over basic packages, and oversized packages because those customers paid a premium to have guaranteed twoday delivery... 
Quadratic Functions
Please explain to me how to do the following problems, I don't understand them. Thanks! Find the xintercepts (if any) for the graph of the quadratic function. 1.f(x) = (x + 2)2  4 Find the yintercept for the graph of the quadratic function. 5.y + 9 = (x + 3)2 Find the ... 
Math
A man can do a certain task in 21 hours, another man can do the task in 28 hours and a boy can do the task in 48 hours. Find how long it will take to do the task if all three work. 
algebra
A man can do a certain task in 21 hours, another man can do the task in 28 hours and a boy can do the task in 48 hours. Find how long it will take to do the task if all three work. 
trigonometry
i am homeschooled so i don't really have a teacher teaching me one on one. so most of my help comes from here.thnks..can anyone help me on this. use identities to find the indicated function value. secA=5/4 and A in quadrant IV. Find tan A. A. sqrt9/5 B. sqrt9/4 C. sqrt5/4 ... 
algebra
Solve by the subsitution method. 2x+4y=6 3x+y=23 y=23+3x 2x +4(23+3x)=6 2x +92 +12 x =6 x=7 y= 23 I am lost after this could some one help me 
Math
About how tall do you expect one of these trees to be after 22 years? a. 22.31 ft. b. 35.2 ft. c. 44.25 ft. d. 46.2 ft. 
Calculus
Write a differential equation to model the situation given. Do not solve. The radioactive substance neptunium139 decays to 73.36% of its orginal amount after 24 hours. How long would it take for 43% of the original neptunium to be present? What is the halflife of neptunium139? 
Chemistry
dinitrogen pentoxide n2o5 decomposes by a firstorder decomposition in chloroform solvent to yield NO2 and O2. The rate constant at 45°C is 6.2 x 10^4 mins^1. Calculate the volume of O2 obtained from the reaction of 1.00 mol N2O5 at 45°C and 770 mmHg after 20.0 hours. 2 ... 
Chemistry
dinitrogen pentoxide n2o5 decomposes by a firstorder decomposition in chloroform solvent to yield NO2 and O2. The rate constant at 45°C is 6.2 x 10^4 mins^1. Calculate the volume of O2 obtained from the reaction of 1.00 mol N2O5 at 45°C and 770 mmHg after 20.0 hours. N2O5... 
Algebra
Justin recently drove to visit his parents who live 480 miles away. On his way there his speed was 20 miles per hour faster than on his way home (he ran into bad weather). If Justin spent a total of 20 hours driving. Find the two rates.