Octagons have 8 sides. If each side is 5 feet then the perimeter is 40 feet. You add up the sides.
Answer:
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Answer:
Li Jing's formula i.e.
is right.
Step-by-step explanation:
Considering the sequence

A geometric sequence has a constant ratio r and is defined by





So, the sequence is geometric.
as



so



Therefore, Li Jing's formula i.e.
is right.
Answer:

Step-by-step explanation:
Hello, please consider the following.

Hope this helps.
Do not hesitate if you need further explanation.
Thank you
7/8 of an hour is 52.5 minutes. 3/10 of 52.5 minutes is 15.75 minutes. They spent 15.75 minutes warming up and cooling down.