Answer:
22 grams
Step-by-step explanation:
Divide the number of minutes by the half life... 2/1=2
Multiply starting amount by one-half (1/2) a total of the number of half-lives that have passed. ( 2 half lives in our case)
88 * 1/2 *1/2 = 22 grams also written as 88(1/2)^2
