ocanadyoynsr6
12.11.2019 •
Mathematics
Which two ratios form a proportion? a) 1 : 3 and 6 : 3 b) 1 : 3 and 3 : 6 c) 3 : 1 and 9 : 3 d) 3 : 1 and 3 : 9
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Ответ:
Option (C)
Step-by-step explanation:
Two ratios are proportional when one is a multiple of the other.
Consider A: 1 : 3 and 6 : 3
6 : 3 is equivalent to 3(2 : 1). 1 : 3 and 3(2 : 1) are not proportional.
Consider B : 1 : 3 and 3 : 6.
3 : 6 is equivalent to 3(1 : 2).
Again the two ratios are not proportional.
Now for Option C : 3 : 1 and 9 : 3.
9 : 3 is equivalent to 3(3 : 1). Clearly, the two ratios are proportional.
Hence, Option C is the answer.
For similar reasons Option D can be eliminated as well.
Ответ:
The correct answer is about 1206.37
Step-by-step explanation:
V= π · r ^2 · h
V= π · 4^2 · 24
V≈ 1206.37