The table shows the change in the depth of the water during each 2-hour period until 8:00pm. The depth of water was 4.3 feet at
12:00pm near a boat dock on the ocean. What was the depth of the water at 8:00pm?
1 answer:
You might be interested in
Answer:
see explanation
Step-by-step explanation:
These are the terms of an arithmetic sequence with n th term
= a + (n - 1)d
where a is the first term and d the common difference
d = 25 - 20 = 30 - 25 = 5 and a = 20, hence
= 20 + 5(n - 1) = 20 + 5n - 5 = 5n + 15 ← n th term formula