To find the annual cost \( c \) for different numbers of tickets \( t \) using the formula \( c = 30 + 6t \), we can plug in the values of \( t \) you've provided.
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For \( t = 3 \): \[ c = 30 + 6 \times 3 = 30 + 18 = 48 \]
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For \( t = 5 \): \[ c = 30 + 6 \times 5 = 30 + 30 = 60 \]
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For \( t = 7 \): \[ c = 30 + 6 \times 7 = 30 + 42 = 72 \]
Now, completing the table:
| t (number of tickets) | c (annual cost) | |-----------------------|------------------| | 3 | 48 | | 5 | 60 | | 7 | 72 |
You can now enter these results in Zearn.