Look up the law of sines, I suggest Khan Academy. It is better if you know how to do it, it is very useful.
Hello!

We can go through each answer to verify whether each is equivalent to 8 : 6.
4 : 3 is equivalent to 8 : 6 because reducing the ratio 8 : 6 by a factor of 2 yields 4 : 3.
6 : 8 is not equivalent to 8 : 6 because the ratio is reversed.
16 : 12 is equivalent to 8 : 6 because the ratio is increased by a factor of 2.
10 : 8 is not equivalent to 8 : 6. We can verify this by checking whether each term was scaled equally:
10 ÷ 8 = 1.25
8 ÷ 6 = 1.33. Therefore, they are unequal.
7 : 5 is not equal to 8 : 6 for the same reason.
The only correct choices are:
4 : 3 and 16 : 12.
19200 all you have to do to figure this out is multiply 100 times 8 since the is 8 halfs in 4 hours.
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Answer:
d
Step-by-step explanation:
1+1^2=4
2+1=3^2=9
3+1=4^2=16
^(times by self)