+194 Scientists use carbon-14 dating to determine the age of a sample of organic material.
a. The amount CC (in grams) of a 100-gram sample of carbon-14 remaining after ttyears is represented by the equation C=100(0.99988)tC=100(0.99988)t. Use a calculator to find the amount of carbon-14 remaining after 4 years. Round your answer to the nearest hundredth.
The amount of carbon-14 remaining is about ____ grams.
b. What percent of the carbon-14 remains after 4 years? Round your answer to the nearest hundredth.
The percent of carbon-14 remaining is about _____%.
+37170 Just substitute t = 4 into the equation to get (I think your equation is REALLY 100(.99988)^t
100 (.99988)^4 = 99.952 gm after 4 years =99.95 gm (rounded to the nearest hundredth)
99.95/100 x 100% = 99.95 % remains
