Questions: A grocery store buys cereal using the cost function c(n)= when n<100 2n 100 ≤ n ≤ 500 1.9n when n>500 1.8n Where n is the number of boxes of cereal the grocery store buys and c(n) is the cost of the cereal. The grocery store then sells the cereal using the sales function s(c)=1.3c. What is the cost of the cereal if the grocery store buys 250 boxes?

A grocery store buys cereal using the cost function
c(n)= when n<100 2n 100 ≤ n ≤ 500 1.9n when n>500 1.8n
Where n is the number of boxes of cereal the grocery store buys and c(n) is the cost of the cereal. The grocery store then sells the cereal using the sales function s(c)=1.3c. What is the cost of the cereal if the grocery store buys 250 boxes?
Transcript text: A grocery store buys cereal using the cost function \[ \begin{array}{l} c(n)=\left\{\begin{array}{l} \text { when } n<100 \\ 2 n \end{array} \begin{array}{r} 100 \leq n \leq 500 \\ 1.9 n \\ 1.8 n \end{array} \begin{array}{l} \text { when } n>500 \end{array}\right. \end{array} \] Where $n$ is the number of boxes of cereal the grocery store buys and $c(n)$ is the cost of the cereal. The grocery store then sells the cereal using the sales function $\mathrm{s}(\mathrm{c})=1.3 \mathrm{c}$. What is the cost of the cereal if the grocery store buys 250 boxes?
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Solution

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Solution Steps

Step 1: Determine the Appropriate Cost Function

The cost function \( c(n) \) is defined in piecewise form based on the number of boxes \( n \). We need to determine which part of the piecewise function applies when the grocery store buys 250 boxes.

  • For \( 100 \leq n \leq 500 \), the cost function is \( c(n) = 1.9n \).

Since 250 falls within the range \( 100 \leq n \leq 500 \), we use \( c(n) = 1.9n \).

Step 2: Calculate the Cost for 250 Boxes

Using the cost function \( c(n) = 1.9n \), we substitute \( n = 250 \) to find the cost:

\[ c(250) = 1.9 \times 250 \]

\[ c(250) = 475 \]

Final Answer

The cost of the cereal if the grocery store buys 250 boxes is \(\boxed{475}\).

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