A fossil is found that contains 10% of the amount of carbon-14 found in a living being. About how old is the fossil?

A. 15,300 years

B. 17,600 years

C. 19,200 years

D. 20,700 years

Me its important ! marge runs an ice cream parlor. her speciality is triple chocolate sundaes.she can prepare 1 sundae every 2 minutes, and she earns $1.20 for each sundae she makes . if she just makes sundaes for a single shift of at most 4 hours and at least 2 hours , which function relates her earnings to the number of minutes she works?