What is the age of mummified primate skin that contains 8.25% of the original quantity of C presuperscript 14 ? 1.21 cross times 10 to the power of 6 space y e a r s 1.21 cross times 10 to the power of 4 space y e a r s 4.33 cross times 10 to the power of 4 space y e a r s 2.06 cross times 10 to the power of 4 space y e a r s