7/1, I think that’s right
D: Dead plants fall in swamp...
This is the answer because the plants must begin to accumulate in a location, then continue to build tall enough for the rest of the process to continue.
A is incorrect because the plants must die before piling up
B is incorrect because the plants must die and accumulate before compressing
C is incorrect because plants must die before being buried.
7/9 = 42/54...when 42/54 reduces, it becomes 7/9...so this is proportional because proportions are nothing but equivalent fractions.
u could also check it this way...
12/21 = 15/24
cross multiply
(21)(15) = (12)(24)
315 = 288.....these do not equal and are therefore, not proportionate
440/4 = 300/3
110 = 100....not equal, so not proportionate
120/5 = 88/4
24 = 22.....not proportionate
66/82 = 99/123
0.804 = 0.804.......these are proportional
68/172 = 43/123
0.395 = 0.349......nope, not proportional
See below for the combination of the arithmetic operations and exactly five 3's
<h3>How to determine the operations?</h3>
The conditions are given as:
- Exactly five 3's
- Any arithmetic operation or combination of operations
There are no direct rules to this, except by trial and error.
After several trials, we have the following operations:
(3 * 3 - 3 * 3)/3 = 0
3 - 3/3 - 3/3 = 1
(3 + 3 - 3 / 3)-3 = 2
(3 * 3 - 3 + 3)/3 = 3
3 *3/3 + 3/3 = 4
3 +3/3 + 3/3= 5
3 + 3 + (3 - 3)/3 = 6
(3^3 - 3 - 3)/3 = 7
3 + 3 + (3 + 3)/3 = 8
3 + 3 + 3+ 3 -3 =9
3 + 3 + 3 + 3/3 = 10
Read more about arithmetic operations at:
brainly.com/question/25834626
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