lee9724
10.12.2021 •
Mathematics
A stop sign is a regular octagon. Each side of the sign is 12.6 inches long. The area of the stop sign is 770 square inches. What is the length of the apothem to the nearest whole number?
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Ответ:
hi
u0 = 64 with u(n+1) = un *0.75
u3 = 64 *0.75^3 = 27
sum is : 64 * ( 0.75^4 -1) / 0.75-1 = 175
manual proof : 64 + 48+36+27 = 175