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  • Statistics Help Not understanding this problem!!?

    In a survey of 7000 women 4431 say they change their nail polish once a week Construct a 90% confidence interval for the population proportion of women who change thier nail polish once a week.

    1 AnswerMathematics9 years ago
  • Statistics word problem help!!?

    I need the answers to the following questions it seems as if im doing something wrong and I do not know what:

    A researcher wishes to estimate, with 90% confidence, the percentage of adults support abolishing the penny. His estimate must be accurate within 2% of the true proportion.

    A.Find the minimum sample size needed, using a prior study that found that 25% of the respondents said they support abolishing the penny.

    B.No preliminary estimate is available. Find the minimum sample size needed.

    A researcher wishes to estimate, with 99% confidence, the proportion of adults who have high speed internet access. Her estimate must be accurate within 5% of the true proportion.

    A.Find the minimum sample size needed using a prior study that found that 32% of the respondents said they have high speed internet access.

    B. No preliminary estimate is available. Find the minimum sample size needed.

    2 AnswersMathematics9 years ago
  • How to make this a double decimal point?

    a. Return on assets= $19, 440/ [$150,000+$145,5000/2]=1.32%

    What is 1.32% with a double decimal point please calculate it and tell me?

    2 AnswersMathematics10 years ago
  • What to say in my thank-you card to the church?

    I came home sunday and there was an envelope with my name on it it was a scholarship for me to attend the university that I am currently going to I have a thank-you card and want to put a bit of thankfulness of my own word what would be something good to put into the card as a thank you from me.

    4 AnswersReligion & Spirituality1 decade ago
  • I want to know about opening a Ebay store?

    I am looking at opening a ebay store selling restaurant equipment I want to know is this a good decision and I am not looking to get rich but to just profit and do what I have to do? any comments and suggestions are gladly welcomed.

    2 AnswersSmall Business1 decade ago
  • How to find Zx and Zy?

    If z = 7xy + 9y^2, find zx and zy.

    2 AnswersMathematics1 decade ago
  • Finding partial derivatives?

    Suppose that the output Q (in units) of a certain company is Q = 75K1/3L2/3,where K is the capital expenditures in thousands of dollars and L is the number of labor hours. Find ∂Q/∂K and ∂Q/∂L when capital expenditures are $729,000 and the labor hours total 9261. (Round your answers to the nearest whole number.)

    ∂Q/∂K = thousand units

    ∂Q/∂L = thousand units

    1 AnswerMathematics1 decade ago
  • How to find the g of x and g of y?

    If g(x, y) =sqrt 5xy − 7x , find gx and gy.

    1 AnswerMathematics1 decade ago
  • How to find the partial derivative?

    Find the partial derivative of the following with respect to x at the point (1, 2, -4).

    f(x, y) = 2x^3 − 5xy + y^2

    1 AnswerMathematics1 decade ago
  • Find the derivative of this log?

    Find the derivative of the function.

    y = e ^sqrt 6x^2 − 7

    1 AnswerMathematics1 decade ago
  • Find the derivative of this natural log?

    Find y'.

    y = sqrt ln(9x + 7)

    1 AnswerMathematics1 decade ago
  • Find the instantaneous rate of change?

    The percent concentration y of a certain drug in the bloodstream at any time t (in hours) is given by the following.

    y = 100(1 − e^−0.454t)

    (a) What function gives the instantaneous rate of change of the concentration of the drug in the bloodstream?

    (b) Find the rate of change of the concentration after 1 hour. Give your answer to three decimal places.

    1 AnswerMathematics1 decade ago
  • Finding the maximum profit?

    A large corporation with monopolistic control in the marketplace has its average daily costs, in dollars, given by the following.

    C = 700/x + 100x + x^2

    The daily demand for x units of its product is given by p = 60,000 − 50x dollars. Find the quantity that gives maximum profit, and find the maximum profit. What selling price should the corporation set for its product?

    2 AnswersMathematics1 decade ago
  • How many units will minimize average cost?

    If the total cost function for a product is C(x) = 7(x + 3)^3 dollars, where x represents the number of hundreds of units produced, producing how many units will minimize average cost?

    x = hundred units

    Find the minimum average cost. (Round your answer to two decimal places put in dollars per hundred units)

    3 AnswersMathematics1 decade ago
  • How to find the absolute maxima and minima?

    Find the absolute maxima and minima for f(x) on the interval [a, b].

    f(x) = x^3 − 7x^2 − 5x + 1, [-1, 7]

    maximum (x, y) =

    minimum (x, y) =

    .

    4 AnswersMathematics1 decade ago
  • how to find the maximum profit?

    A firm has monthly average costs, in dollars, given by the following function where x is the number of units produced per month.

    C = 36,000/x + 100 + x

    The firm can sell its product in a competitive market for $1700 per unit. If production is limited to 550 units per month, find the number of units that gives maximum profit, and find the maximum profit.

    2 AnswersMathematics1 decade ago
  • How to find the maximum revenue?

    If the total revenue function for a computer is R(x) = 1800x − 23x^2 − x^3, find the level of sales, x, that maximizes revenue and find the maximum revenue in dollars.

    what is x, and also what is the revenue?

    1 AnswerHomework Help1 decade ago
  • How to find the max profit?

    A firm can produce 500 units per week. If its total cost function is C = 300 + 1300x dollars and its total revenue function is R = 1800x − x^2 dollars, how many units, x, should it produce to maximize its profit? x= how many units and also find the maximum profit.

    1 AnswerMathematics1 decade ago
  • What will produce the max profit?

    If the profit function for a product is P(x) = 2400x + 70x^2 − x^3 − 80,000dollars, selling how many items, x, will produce a maximum profit? Also find the maximum profit.

    2 AnswersMathematics1 decade ago
  • How to find the maximum?

    A company handles an apartment building with 64 units. Experience has shown that if the rent for each of the units is $520 per month, all the units will be filled, but 1 unit will become vacant for each $10 increase in the monthly rate. What rent should be charged to maximize the total revenue from the building if the upper limit on the rent is $680 per month?

    1 AnswerMathematics1 decade ago