The populations, P, of six towns with time t in years are given by: I) P=1000(1.08)^t II) P= 600(1.12)^t III) P = 2500(0.9)^t IV) P=1200(1.185)^t V) P=800(0.78)^t VI) P=2000(0.99)^t a. Which towns are growing in size? Which are shrinking? b.

55,197 results
  1. biology

    Mosquitoes can carry and transmit many diseases to humans. In the past, the insecticide DDT was heavily used to reduce mosquito populations in order to reduce instances of disease transmission. However, after some time, mosquito populations developed a

  2. Trigonometry

    A passenger in an airplane flying at an altitude of 10 kilometers sees two towns directly to the left of the plane. The angles of depression to the towns are 28° and 55°. How far apart are the towns?

  3. Maths

    The scale on a map is 1 :500000, Two towns ate 7cm apart, whats the actual distance between towns. Give your answers in Km.

  4. algebra

    A biologist studied the populations of white-sided jackrabbits and black-tailed jackrabbits over a 5-year period. He modeled the populations, in thousands, with the following polynomials where 𝑥 is time, in years. White-sided jackrabbits: 6.5𝑥^2 −

  5. Math, Trigonometry

    Cate is sailing her boat off the coast, which runs straight north and south. Her GPS confirms that she is 8 km from Haytown and 10 km from Beeville, two towns on the coast. The towns are separated by an angle of 80°, as seen from the boat. A helicopter is

  6. Algebra

    A biologist studied the populations of black bear and brown bears over a 10-year period. The biologist modeled the populations, in thousands, with the following polynomials where x is time, in years. black bears: 2.3x^2 - 5.6x + 2.3 brown bears: 2.4x^2 +

  7. Algebra - help

    A biologist studied the populations of common guppies and Endler’s guppies over a 6-year period. The biologist modeled the populations, in tens of thousands, with the following polynomials where x is time, in years. common guppies: 3.1x2 + 6x + 0.3

  8. Pre Calc

    Naturalists findthat the populations of some kinds of predatory animals vary periodically. Assume that the population of foxes in a certain forext vareis sinusoidally iwth time. REcord started being kept when time t = 0 years. A minimum number, 200 foxes,

  9. differential equation

    If P(t) is the amount of dollars in a savings bank account that pays a yearly interest rate of r% compounded continuously ,then dP/dt=(r/100)(P) , t in years . Assume the interest is 5% annually ,P(0)=$1000 ,and no monies are withdrawn a)how much will be

  10. math

    a passenger in an airplane at an altitude of a = 20 kilometers sees two towns directly to the east of the plane. The angle of depression to the towns are 55˚ and 28˚. How far apart are the towns?

  11. Ecology

    After spraying crops with DDT for several years, farmers found that populations of insect pests reboundED. One reason was that insects had developed resistance to the insecticide. Suggest another reason, based on what you know about populations, pyramids,

  12. PreCalc

    Naturalists find that the populations of some kinds of predatory animals vary periodically. Assume that the population of foxes in a certain forest varies sinusoidally with time. Records started being kept when t = 0 years. A minimum number, 200 foxes,

  13. math

    The towns of Franklin and Chester post their populations on signs just outside of their towns. The signs are updated once a year at the beginning of the year. During year 111, Franklin's sign read "\text{Franklin: Population of } 20{,}000Franklin:

  14. Trigonometry

    The populations, P, of six towns with time t in years are given by: I) P=1000(1.08)^t II) P= 600(1.12)^t III) P = 2500(0.9)^t IV) P=1200(1.185)^t V) P=800(0.78)^t VI) P=2000(0.99)^t a. Which towns are growing in size? Which are shrinking? b. Which town is

  15. History

    1. The Dominican friars: A. were established in the ninth century. B. were first led by the highly intellectual Dominic de Guzmán. C. lived among the people and helped the poor. D. became key factors in combating heresy under the leadership of the Holy

  16. Calculus

    Two separate rabbit populations are observed for 80 weeks, starting at the same time and with the same initial populations. The growth rates of two rabbit populations are modeled as follows, where t =0 corresponds to the beginning of the observation

  17. math

    The towns of Franklin and Chester each decided in the same year to begin posting their populations on signs by the main entrances into the towns. Each year, they update the signs. Franklin had a population of 20,000 people in the first year that they

  18. Algebra

    The Fresh and Green Company has a savings plan for employees. If an employee makes an initial deposit of $1000, the company pays 8% interest compounded quarterly. How many years will the employee need to leave the money in the account to have $5000? 19

  19. Mathematics

    A boys' age is x years and his father's age is five years as old as his son . what will be the sum of their ages in ten years time. These age is now 17.how old will he be in x years time and what is the sum of his age in x years time and 15 years ago

  20. Math

    A passenger is an airplane at an altitude of a=20 kilometers sees two towns directly to the east of the plane. the angles of depression to the towns are 28 degrees and 55 degrees. how far apart are the towns

  21. algebra

    1) how many billions of years will it take 1000 grams of uranium-238 to decay to just 125 grams? 2) a researcher had 37.5 g left from a 600 g sample of sulfer-35. how many half-lives passed during that time? 3) look at problem 2. how many days passed

  22. math

    the half life of the carbon isotope C14 is about 5700 years. A. about how many years does it take 1000 grams of this substance to decay to 500 grams? B. about what percent of the original amount would you expect to find after 1000 years?

  23. maths

    Compound Interest: You deposit $1000 in an account with an annual interest rate of r (in decimal form) compounded monthly. At the end of 5 years, the balance is A = 1000(1 + (r/12)) ^60

  24. mathematics

    The populations of five towns are 15600, 17300, 62800, 74000 and 34400 each to the nearest hundred. Find the total population of the five towns to the nearest thousand.

  25. American Government

    Over time, what has been the trend of rural vs. urban population in the United States? a. The rural populations have developed extensive farmland to continue being essential. b. The rural populations have increased, and the urban populations have

  26. Math (Business)

    Find the value of the ordinary annuity at the end of the indicated time period. The payment​ R, frequency of deposits m​ (which is the same as the frequency of​ compounding), annual interest rate​ r, and time period t are given. amount ​1,000​;

  27. history

    What was a boomtown? A. Towns that grew up quickly near mining sites B. Towns being demolished*** C. Loud cities D. Towns with nothing but a railway station

  28. Bio

    Succession involves one community replacing another. What must be true of each community that appers? A. the population are adapted to their environment B. the populations get larger as the next community is established C.the populations contain very

  29. statistics

    if we are testing for the difference between two populations, it is assumed that the two populations are approximately normal and have equal variances, true or false

  30. algebra

    A biologist studied the populations of black bear and brown bears over a 10-year period. The biologist modeled the populations, in thousands, with the following polynomials where x is time, in years. black bears: 2.3x^2 – 5.6x + 2.3 brown bears: 2.4x^2 +

  31. statistics

    A lottery offers one $10000 prize, one $5000 prize and five $1000 prizes. 1000 tickets are sold at $30 each . Find the expectation if a person buys one ticket workings: 9970/1000+4970/1000+4850/1000-29790/1000 = -10000/1000 =-$10

  32. MATH HELP ASAP!

    Randee invested $1000 for college in an account earning 5% simple interest. When she withdrew the investment, she had earned a total of $550 in interest. How long was the money invested? A 9 years B 10 years C 11 years D 12 years

  33. math

    a towns population went from 25800 to 42600 in 15 years. what was percent of change.

  34. Science

    A material has 32 atoms in all; 24 decayed and the rest undecayed. If the half-life of the radioactive material is 1000 years, what is the age of the material? a. 1000 years b. 2000 years c. 3000 years d. 4000 years

  35. Algebra

    A biologist studied the populations of common guppies and Endler’s guppies over a 6-year period. The biologist modeled the populations, in tens of thousands, with the following polynomials where x is time, in years. common guppies: 3.1x2 + 6x + 0.3

  36. Science - Biology

    After spraying crops with DDT for several years, farmers found that populations of insect pests rebounded. One reason was that the insects had developed resistance to the insecticide. Suggest another reason, based on what you know about populations,

  37. Biology

    Questions 109-111 refer to the map below of the distribution of several populations on the continents of Eurasia and North America. These populations were derived from a common ancestral species. The area enclosed by a given dotted line represents the

  38. Science

    Hunting lions has been banned in some parts of Africa. If this law is enforced, what can we expect to happen to the populations of small mammals in the same locations? A) The small mammal populations will decrease. B) The small mammals will become extinct

  39. math

    Jamie invests $500 in an account that is compound continuously at an annual rate of 5% according to the formula A=Pe^rt, where A is the amount accrued, P is the principal, r is the rate of interest and t is the time in years. approximately how many years

  40. statistics

    Among the four northwestern states, Washington has 51% of the total population, Oregon has 30%, Idaho has 11%, and Montana has 8%. A market researcher selects a sample of 1000 subjects, with 450 in Washington, 340 in Oregon, 150 in Idaho, and 60 in

  41. Chem

    Circle the letter of the unit of mass commonly used in chemistry that equals 1/1000 Kilogram. a)gram b)Milligram c)milliliter Kilo is 1000. What is 1/1000 of 1000?

  42. Calculas HS

    continous compounding you have $1000 wiht which to open an account to which you plan also to add $ 1000 per year. all funds in the account will earn 10% annual interest compounded continously. if the added deposits are also credited to your account

  43. math

    Suppose that you were saving money over 5 years to use in a purchase later. You have $1000 to put in the savings. After surveying several banks for savings plans, you found these options. "A" stands for the amount you will have in the bank after x years. *

  44. ecology

    after spraying crops with ddt for several years, farmers found that populations of insect pests rebounded. one reason was that the insects had developed resistance to the insecticide. suggest populations, pyramids, predators and competitors

  45. science

    after spraying crops with ddt for several years, farmers found that populations of insect pests rebounded. one reason was that insects had developed resistance to the insecticide. suggest another reason, based on what you know about populations, pyramids,

  46. Social Studies

    China and India share a distinction regarding their populations. What is it? a. Approximately two-thirds of their populations live in urban areas b. Both populations have grown to more that one billion people c. About 20 percent of their population are

  47. MATH HELP

    $1000 invested at an APR of 9% for 9 years. If interest is compounded annually, what is the amount of money after nine years?

  48. Math

    Find the amount of money in the account at the end. $1000.00, 4 years, 7% compounded semi-annually A=P(1+r/n)^nt r=0.07, t=4, P=$1000.00, n=2 A=P(1+r/n)^nt A=$1000.00(1+0.07/2)^2-4 A=$1000(1.035)^8 A=$1000(1.316809037) A=$1,316.809037 My answer is:

  49. algebra

    hi! i need some help with Lesson 9: Polynomials and Factoring Unit Test. A biologist studied the populations of common guppies and Endler's guppies over a 6-year period. The biologist modeled the populations in tens of thousands where 'x' is time, in

  50. Economics/Math

    3. Assume you own a painting. If you sold it now, you could get £500 for it. However, the amount that people will be willing to pay in the future increases by £25 in odd years (including the first one) and by £26 in even years, for the next 53 years. If

  51. Math

    The value of a computer bought in 1998 decreases as time passes. Two years after the computer was bought, it was worth $2,600. Five years after it was bought, it was worth $2,000. If the relationship between number of years past 1998 and value of the

  52. Algebra

    The value of a computer bought in 1998 decreases as time passes. Two years after the computer was bought, it was worth $2,600. Five years after it was bought, it was worth $2,000. If the relationship between number of years past 1998 and value of the

  53. math

    A passenger in an airplane flying at an alti- tude of 14 kilometers sees two towns directly to the left of the plane. The angles of depres- sion to the towns are 30◦ and 52◦. How far apart are the towns? Answer in units of ft.

  54. Business

    You have just started work for a small company, FitCo, that develops private fitness clubs in small towns. FitCo buys or leases a local hotel or motel, then renovates to provide a gym, swimming pool, sauna, Jacuzzi, and a small café where patrons can buy

  55. business

    You have just started work for a small company, FitCo, that develops private fitness clubs in small towns. FitCo buys or leases a local hotel or motel, then renovates to provide a gym, swimming pool, sauna, Jacuzzi, and a small café where patrons can buy

  56. Algebra Question~!

    A biologist studied the populations of common guppies and Endler’s guppies over a 6-year period. The biologist modeled the populations, in tens of thousands, with the following polynomials where x is time, in years. common guppies: 3.1x^2 + 6x + 0.3

  57. Science

    Studies indicate that fertilizers from nearby farm fields have entered a lake. Which of the following describes a likely change in this ecosystem in the future? A.Algae populations will increase and trout populations will decrease.* B.Algae populations

  58. compound interest

    How do I solve these problems? Complete the table for a savings account in which interest is compounded continuously. 1. Initial Investment: $1000 Annual % Rate: 3.5% Time to Double: ? Amount After 10 Years: ? 2. Initial Investment: $750 Annual % Rate: ?

  59. Calc Help

    demand = (p+1)sqroot(q+1)=1000. Find elasticity of demand at a price of $39 per unit. I am really struggling with this problem is there anyone that can help me? i am not familiar with the terminology, but if you are trying to solve for p, it is not that

  60. Physics

    How many years would it take the planet to orbit the sun. How do you calculate. All I have is, that the planet is 97 times farther from sun than earth or 97 Astronomical units Using Kepler's Law you find that the anser is 97^(1.5) years. You can estimate

  61. math

    Inflation is running 2% per year when you deposit $1000 in an account earning interest of 13% per year compounded annually. In constant dollars, how much money will you have two years from now? (Hint: First calculate the value of your account in two years'

  62. Maths

    Annie drives between two towns at an average speed of 40 mph. Tariq drives between the same two towns on the same route at an average speed of 25 mph. Annie leaves the first town at 9 am and arrives at the second town at 10:30 am. If Tariq sets off at the

  63. math

    Two towns P and Q lie on the same parallel latitude such that P is due east of Q. When local time at Q is 9.50am , the local time at P is 3.12pm. ( a) Find the longitude difference between P and Q (2mks) ( b) Given that the longitude of P is 52°E , find

  64. Math

    one Percentage increase / decrease formula in excel that full all the conditions that are mentioned below 2012 2011 1 0 0 2 0 500 3 500 0 4 500 1000 5 1000 500 6 500 (1000) 7 (1000) 500 8 (500) (1000) 9 (1000) (500) Dear its urgent

  65. American History

    In New England, the town is a major unit of local government. Except for a few major cities, each of the six states in the region is divided into towns. Each town generally includes all of the rural and the urban areas within its boundaries. Which best

  66. HELP ME MATH PLEASE

    $1000 invested at an APR of 9% for 9 years. If interest is compounded annually, what is the amount of money after nine years?

  67. PreCalc

    h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 6 0 2 2 5 7 6 7 ok this is what i mean. For exmaple take this problem that I asked for help with before Naturalists find that the populations of some kinds of predatory animals

  68. Math, algerbra 2, algerbra, precalculus, homework

    You have 4 different investment options 4% interest 7% compound continuously 19% annually 5% every month You have 1000 dollars how long does it take for the value to double in each other investment options? How long does it take until 1000 becomes 1800?

  69. math

    5 years from now a boy's age will be 2 time the square of what it was 5 years ago.how old is he now? a)15/2 years c)7 years b)3 years d) 8 years

  70. math

    (MC) If the compound interest on $1000 for two years at 9% p.a., payable half-yearly is $x, find x. A) 1000x9/100x2 B) 1000(1+9/100)⁴ C) 1000(1+4.5/100)⁴ D) 1000(1+9/100)²-1000 E) 1000(1+4.5/100)⁴-1000

  71. PreCalculus

    How do i find the phase shift in this problem Naturalists find that the populations fo some kinds of predatory animals vary periodically. Assume that the population of foxes in a certain forest varies sinusoidally with time. Records started being kept when

  72. Finance

    Your Uncle has two alternative inheritence for you. A. You receive 5000 today and 1000 per year for the next 8 years. or B. 5000 today and nothing each year for the next 7 years and at end of 8th year receive 12,000 Which is best and why. Current interest

  73. Math

    Grace deposits $1000 in a mutual fund earning 9.25% annual interest, compounded monthly. 1. Write an exponential function that models this situation where y is the amount of Grace's investment and x is time in years. 2. Use your equation to complete the

  74. Math

    Grace deposits $1000 in a mutual fund earning 9.25% annual interest, compounded monthly. 1. Write an exponential function that models this situation where y is the amount of Grace's investment and x is time in years. 2. Use your equation to complete the

  75. Math College 115

    You spend $1000 on a computer and for tax purposes chose to depreciate it (or assume it decreases in value) to $0 at a constant rate over a 4-year period. a) calculate the rate of chage of the assumed value of the equipment over 4 years. The rate of change

  76. math

    The position of two towns X and Y are given to the nearest degree as X(45° N, 10° W) and Y (45 N°, 70° W). Find (a) The distance between the two towns in (i) Kilometers ( take the radius of the earth as 63711) (ii) Nautical miles ( take I nautical mile

  77. Math

    The position of two towns X and Y are given to the nearest degree as X(45° N, 10° W) and Y (45 N°, 70° W). Find 70-10 =60 Find: (a) The distance between the two towns in (i) Kilometers ( take the radius of the earth as 6370) 60/360

  78. managerial economics

    assuming that the firm's goal is to maximize present value of the profits in the subsequent 5 years, which of the following flows of profit would achieve that goal? Justify your answer. Note that the flows are represented by 5-tuples, i.e. five number each

  79. math, log, interest, precalc

    Investment: collectable toys Current yield 5% per month Rick: Extreamly high Your inital value is 1000 dollars what is the doubling time, time to reach 1800, and value after 10 years?

  80. College Algebra

    According to data from the National Vital Statistics Report, the marriage rate (marriages per 1000) can be described by y=-0.146x+11.074, where x is the number of years after 1980. For what years does this model indicate that the marriage rate was above 9

  81. Finance

    A bank is willing to give you a Rs1,000,000 home mortgage at 12% interest, compounded semiannually. The loan will be amortised over 25 years, but the interest rate is fixed for only the first 5 years. What is the monthly mortgage payment for the first five

  82. Science

    Hunting lions has been banned in some parts of Africa. If this law is enforced, what can we expect to happen to the populations of small mammals in the same locations? A) The small mammal populations will decrease. ** B) The small mammals will become

  83. Math

    Let d(t) be the shortest distance between Earth and the nearest other planet as a function of time t (where t is in years and t = 0 is noon on January 1, 1000 A.D., say). Is d continuous? Why or why not?

  84. Algebra 1

    (word problem): On a map two towns are 4 cm apart. If the scale is 1 centimeter = 80 kilometers, how far apart are the towns?

  85. History

    Which of the following describes why towns were important in royal Georgia? A professionals practiced there B artisans had there shops C towns provided a market for farmers and planters D all of the above***

  86. Math

    I have a question. Is it possible to calculate the length of a road between two towns. If we know when two vehicles travelling back and forth between the towns pass each other ? Also one vehicle is faster than the other one. Just need a hint or idea how to

  87. Micro

    If i buy a machine it will save me $1000 each year for 3 years. If the interest rate is 8% what is the most I should pay for the machine? 1000/.08 = 12500.

  88. Math

    one Percentage increase / decrease formula in excel that full all the conditions that are mentioned below 2012 2011 1 0 0 2 0 500 3 500 0 4 500 1000 5 1000 500 6 500 (1000) 7 (1000) 500 8 (500) (1000) 9 (1000) (500) Dear its urgent

  89. Math

    When Curtis was born, his parents began depositing $1000 at the end of every year into an annuity to save for his college education. If the account paid 7% compounded annually for the first 10 years and then dropped to 5% for the next eight years, how much

  90. History

    What advantages did Europeans have over the indigenous populations of Mesoamerica and South America? And describe the impact they had on those populations.?

  91. biology

    How does antibiotic resistance appear to develop within a bacterial populations? What are the health implications for human populations that increase the use of antibacterial soaps

  92. Maths

    The distance between 2 towns is 330km. A train travels between these two towns and returns on the same day. On the return journey, the train left late and so the driver decided to drive the train 5km/h fasterthan its inward journey, and it took 30 minutes

  93. Math

    The value of a computer bought in 1998 decreases as time passes. Two years after the computer was bought, it was worth $2,600. Five years after it was bought, it was worth $2,000. If the relationship between number of years past 1998 and value of the

  94. math

    . The position of two towns X and Y are given to the nearest degree as X(45° N, 10° W) and Y (45 N°, 70° W). Find 70-10 =60 (a) The distance between the two towns in (i) Kilometers ( take the radius of the earth as 6370) 60/360 *2*3.142*6370*cos(45) =

  95. College Algebra/pre-calculus

    The Pointless Pencil Company purchases a new stamping machine for the production line that cost $8000. The equipment will be replaced in 10 years at which time its salvage value is expected to be $1000. Write a linear equation giving the value, y, of the

  96. Exp. Growth + Decay (HELP ME PLEASE!)

    1. Suppose you invest $1,000 in a CD that is compounded continuosly at the rate of 5% annually. What is the value of this investment after one year? two years? five years? A=1000(e^(.5x1)) = 1648.72 A=1000(e^(.5x2)) = 2718.28 A=1000(e^(.5x5)) = 12182.49 2.

  97. science

    In general, populations have the ability to increase exponentially, but why do you think that most populations are fairly constant in size?

  98. math

    if i deposit inr 1000 monthly for 35 years what will be the amount after 35 years ?

  99. english

    original sentence: The new highway follows the river, bypasses the small towns and you can save a lot of time The correct sentence: The new highway follows the river, bypasses, small towns, will save you a lot of time.

  100. Finance

    I am having a hard time figuring out the equation that I should be using to determine the value of a $1000 denomination for a Bond with a 7% coupon rate maturing in 20 years with a required interest rate of 8%. Is there maybe any online calculators that

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