solve pls: number of club members for maximum revenue

4 posts / 0 new
Last post
Juny Geraldizo ...
Juny Geraldizo Patierez's picture
solve pls: number of club members for maximum revenue

A student club on a college charges monthly membership dues of P10, less 5 centavos for each member over 60. How many members would give the club, the most revenue from the monthly dues?

Jhun Vert
Jhun Vert's picture

Let
R = monthly revenue
x = number of student-member in excess of 60
x + 60 = total number of student-member

For number of members ≤ 60
monthly dues for each member = P10

For number of members > 60
monthly dues for each member = P(10 - 0.05x)

$R = (10 - 0.05x)(60 + x)$

$R = 600 + 7x - 0.05x^2$

$\dfrac{dR}{dx} = 7 - 0.1x = 0$

$x = 70$

total number of members = 70 + 60 = 130       answer

Juny Geraldizo ...
Juny Geraldizo Patierez's picture

thank you kaayu sir.

Jhun Vert
Jhun Vert's picture

way sapayan

Add new comment

Deafult Input

  • Allowed HTML tags: <img> <em> <strong> <cite> <code> <ul> <ol> <li> <dl> <dt> <dd> <sub> <sup> <blockquote> <ins> <del> <div>
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.
  • Mathematics inside the configured delimiters is rendered by MathJax. The default math delimiters are $$...$$ and \[...\] for displayed mathematics, and $...$ and \(...\) for in-line mathematics.

Plain text

  • No HTML tags allowed.
  • Lines and paragraphs break automatically.