Answer:
3 : 4 = 12 : 6
2 : 5 = 30 : 75
7 : 9 = 14 : 18
8 : 3 = 64 : 24
Step-by-step explanation:
3 : 4 = 12 : ?
3/4 = 12/?
3 x ? = 12 x 4
3 x ? = 48
? = 48 ÷ 3 = 16
2 : 5 = 30 : ?
2/5 = 30/?
2 x ? = 30 x 5
2 x ? = 150
? = 150 ÷ 2
? = 75
7 : 9 = ? : 18
7/9 = ?/18
7 x 18 = ? x 9
126 = ? x 9
? = 126 ÷ 9
? = 14
8 : 3 = 64 : ?
8/3 = 64/?
8 x ? = 64 x 3
8 x ? = 192
? = 192 ÷ 8
? = 24
Answer:

Step-by-step explanation:
So first calculate what fraction of the circumference the arc is.

Now the circumference is 6, so one eighteenth of that is 
Treat 12 as 12/1 that means 12 divided into 1 part
1/4 times 12/1
multiply the top and the bottom becuase

times

=

so
1/4 times 12/1=(1 times 12)/(4 times 1)=12/4=3/1=3
the answe ris 3
1.) 4, 2, 1, 1/2,1/4,... 2.) 2, 6, 18, 54, 162, … 3.) <span>−4, −16, −64, −256, … are geometric sequences because common ratio is same. Example: 1.) ratio of 1st and 2nd term is 1/2. similarly ratio of 3rd and 4th term is 1/2 and so on. </span>
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