bethzabezarahi
12.12.2021 •
Mathematics
If the telephone was invented in 1876 how old was it in 1991 how long had it been around
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Ответ:
115 Years Old
Step-by-step explanation:
1991-1876 = 115
Ответ:
Step-by-step explanation:
Cone Volume = (π • r² • h) ÷ 3
109.9 = PI * 5 * radius^2 / 3
3* 109.9 / (3.14 * 5) = radius^2
329.7 / 15.7
radius^2 = 21
radius = 4.582575695