the cost of a long - distance phone call, in ...
the cost of a long - distance phone call, in cents, can be modeled by the ceiling function whose graph is shown. how much does it cost to talk for 3.1 minutes? 2 cents 3 cents 4 cents 5 cents
Answer
# Answer:
4 cents
# Explanation:
## Step1: Locate the talk time on the x-axis.
The given talk time is 3.1 minutes. Find 3.1 on the horizontal axis labeled "Talk Time (minutes)".
## Step2: Identify the relevant interval on the graph.
The value 3.1 falls within the interval $3 < \text{Talk Time} \le 4$.
## Step3: Determine the cost for this interval.
Look at the graph segment corresponding to the interval $(3, 4]$. This segment is a horizontal line.
## Step4: Read the cost from the y-axis.
The horizontal line segment for the interval $(3, 4]$ is at the level $y = 4$ on the vertical axis labeled "Cost (cents)". Therefore, the cost for 3.1 minutes is 4 cents.