carbon- 14
Carbon-14 is the isotope commonly used for dating wood and charcoal less than about 75,000 years old. This isotope is useful because plants take in carbon-14 while they are alive, and it decays at a known rate after the plant dies, allowing for accurate dating.
carbon- 14
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6% of 75000= 6% * 75000= 0.06 * 75000= 4,500
10% of 75000 = 7500 = 10% * 75000 = 10%/100% * 75000 = 7500
12% of 75000= 12% * 75000= 0.12 * 75000= 9000
4.5% of 75000= 4.5% * 75000= 0.045 * 75000= 3375
40% of 75000 = 40% * 75000 = 0.4 * 75000 = 30000
10% of 75000 = 7500 = 10% * 75000 = 10%/100% * 75000 = 7500
2.5% of 75000 = 2.5/100 x 75000 = 1875
2% of 75000 = 75000*2/100 = 1500
12.5% of 75,000 = 12.5% * 75000 = 0.125 * 75000 = 9,375
75000 as a percentage of 90582 = 100*75000/90582 = 82.8%