Answer:
50 percent
5,730 years; The graph shows that 50 percent of the carbon-14 atoms have decayed after 5,730 years, so 5,730 is the half-life of carbon-14. 2. 12.5% 3.
Radiocarbon dating involves determining the age of an ancient fossil or specimen by measuring its carbon-14 content. ... Green plants absorb the carbon dioxide, so the population of carbon-14 molecules is continually replenished until the plant dies. Carbon-14 is also passed onto the animals that eat those plants.
To solve this problem, we are going to set up an equation and let our unknown value be represented by the variable x. First, we must convert 25% into its decimal equivalent by dividing 25/100.
25/100 = 0.25
We should keep in mind that when we use the word “of” in math, it represents multiplication. This means that our equation should be set up with 2/3 multiplied by 27 on the left side equal to 0.25 times x on the right side, as modeled below:
(2/3)(27)=0.25x
To simplify this equation, we should perform the multiplication on the left side of the equation.
18 = 0.25x
Finally, we should divide both sides of the equation by 0.25 in order to isolate the variable x on the right side of the equation.
x = 72
Therefore, your answer and unknown number is 72.
Hope this helps!
Answer:
Frank is correct.
Step-by-step explanation:
Frank is correct because the bag does not have 49 marbles but it does have 7 total.
You can double check this: 6 + 1 =7. 7 marbles total so frank is correct!
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5:15 Because Rotating 90 Degrees would be at the 3 so. 5:15
