milkshakegrande101
19.06.2020 •
Mathematics
Please answer this correctly
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Ответ:
17.85 feet.
Step-by-step explanation:
Area = 1/4 * 3.14 * r^2 where r is the radius
So r^2 = 19.625 / (1/4 * 3.14)
r^2 = 25
r = 5 feet.
The perimeter = 2r + 1/4 * 2* 3.14*r
= 2*5 + 7.85
= 17.85 feet.
Ответ:
40cm * 10 = 400 km
50km/50 = 1cm
400km/50 = 8cm
A: 8cm