Question

Strontium-90 has a half-life of about 28 years. After 112 years, how many grams of a 50 g sample will remain?

Answer 1

112 = 4 * 28  so  the factor is (1/2)^4  = 1/16
Number of grams remaining = 50 * 1/16  =  3.125

Its a

Answer 2

Answer:

3.125G

Step-by-step explanation: