Solution: The number of devices follows an arithmetic sequence where the first term is 13 and the common difference is 7. The formula for the $n$th term is:

March 11, 2026

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Question: A paleobotanist measures the heights of four ancient plant specimens. Their heights are 18.3 cm, 15.6 cm, 21.4 cm, and 16.7 cm. What is the total height if they were stacked one on top of the other?
Solution: To find the total height, we sum all the individual heights:
Question: A technology consultant is evaluating the number of devices connected to a network. If the number of devices increases by 7 each day starting from 13 on day 1, how many devices are connected on day 15?
Substituting $a_1 = 13$, $d = 7$, and $n = 15$:
Question: A STEM advocate is distributing 240 science kits evenly among schools. If each school must receive at least 12 kits, what is the maximum number of schools that can receive kits?
Solution: To find the maximum number of schools, divide the total kits by the minimum per school:

Solution: The number of devices follows an arithmetic sequence where the first term is 13 and the common difference is 7. The formula for the $n$th term is:

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