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?
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?
Solution
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 \(\boxed{475}\).