Question
A cell phone plan's monthly cost C(m) is given by C(m) = 25 + 0.10m, where m is the number of minutes used. What is the cost for using 300 minutes?
They cost is $_______.
Answers
GPT-4o mini
To find the cost for using 300 minutes, we can substitute \( m = 300 \) into the cost function \( C(m) \).
The cost function is given by:
\[
C(m) = 25 + 0.10m
\]
Substituting \( m = 300 \):
\[
C(300) = 25 + 0.10(300)
\]
Calculating the second term:
\[
0.10(300) = 30
\]
Now substitute this value back into the equation:
\[
C(300) = 25 + 30 = 55
\]
Therefore, the cost for using 300 minutes is \( \text{\$55} \).
So, the cost is \$55.
The cost function is given by:
\[
C(m) = 25 + 0.10m
\]
Substituting \( m = 300 \):
\[
C(300) = 25 + 0.10(300)
\]
Calculating the second term:
\[
0.10(300) = 30
\]
Now substitute this value back into the equation:
\[
C(300) = 25 + 30 = 55
\]
Therefore, the cost for using 300 minutes is \( \text{\$55} \).
So, the cost is \$55.