Math

posted by .

In one U.S. city, the quadratic function models the median, or average, age, y, at which men were first married x years after 1900. In which year was this average age at a minimum? (Round to the nearest year.) What was the average age at first marriage for that year? (Round to the nearest tenth.)

  • Math -

    y= ax^2+bx+ c

    using calculus...

    dy/dx=2ax+b=0
    x=-b/2a is either the max, or min.

    You need more information...

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Math

    The average life expectancy for American men born in 1900 was 55 years. Life expectancy has increased by about .2 year for each birth year after 1900. If this trend continues, for which birth year will the average life expectancy be …
  2. algebra 1

    Totally lost on this. Any help would be awesome! 1. The function A(t)=0.233t+5.87 can be used to estimate the median age of cars in the United States t years after 1990. (In this context, we mean that if the median age of cars is 3 …
  3. math

    10 girls have their average age 14 year and 12 boys have their average age as 16 years . when 6 boys from these 12 join tha 10 girls,they all together have average age as 14.5 year .what is tha average age of tha remaining 6 boys.
  4. statistics

    the mean age at which men in the united states marry for the first time follows the normal distribution with a mean of 24.5 years. the standard deviation is 2.8 years. for a rabdom sample of 59 men, what is the likelihood that the …
  5. marketing

    QUESTION #1 cost analysis with graph office copier has an initial price of $2500. A service contract costs $200 for the first year and increases $50 per year thereafter. It can be shown that the total cost of the copier after n years …
  6. Trigonometry help please!

    Assume that height is a function of age and that H=f(a) is the average height (in inches) for females in the US at age (a) years. What is the practical interpretation of f(z)+20?
  7. statistics

    AAA reports that the average age of a car on U.S. roads in recent years has risen to 7.5 years. Suppose that the distribution of the age of automobiles assumes a mound shaped distribution. If 99.7% of the ages are between 1 year and …
  8. Urgent math

    please help The fox population in a certain region has a relative growth rate of 7% per year. It is estimated that the population in 2005 was 19,000. (a) Find a function n(t) = n0ert that models the population t years after 2005. n(t) …
  9. algebra

    In one U.S. city, the quadratic function models the median, or average, age, y, at which men were first married x years after 1900. In which year was this average age at a minimum?
  10. Math

    Which of the following types of information is suited for display on a double line graph?

More Similar Questions