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ahrayia [7]
3 years ago
13

LONG DISTANCE For Meg’s long-distance calling plan, the monthly cost C in dollars is given by the linear function C(t) = 6 + 0.0

5t, where t is the number of minutes talked.
a. What is the total cost of talking 8 hours? of talking 20 hours?
b. What is the effective cost per minute (the total cost divided by the number of minutes talked) of talking 8 hours? of talking 20 hours?

I really need help
Mathematics
1 answer:
Neko [114]3 years ago
5 0

Answer:

Step-by-step explanation:

The monthly cost is C(t) = 6 + 0.05t, where t is the number of minutes talked.

Talking for 8 hours would cost C(t) = 6 + 0.05(8), or $6.40;

Talking for 20 hours would cost C(20) = 6 + 0.05(20), or $7.00.

The effective cost per minute in the first case is $6.40/8 min = $0.80/min, and that in the second case is $7.00/20 min = $0.35/min

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