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The function below can be used to calculate the cost of making a long distance call, f(m), which is based on a $2.50 initial charge and a fee of $0.12 per minute, m, that the call lasts, f(m) = 2.5 + 0.12 m. If Natalie paid $6.82 for one call, how many minutes long was it
It was 36 minutes long
Step-by-step explanation:
∵ The function is f(m) = 2.5 + 0.12 m, where f(m) is the cost of a
distance call for m minutes
∵ Natalie paid $6.82 for one call
- Substitute f(m) by 6.82 in the equation above
∴ 6.82 = 2.5 + 0.12 m
- Subtract 2.5 from both sides
∴ 4.32 = 0.12 m
- Divide both sides by 0.12
∴ 36 = m
∴ The length of the call = 36 minutes
It was 36 minutes long
Learn more:
You can learn more about the function in brainly.com/question/10541435
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