Answer:The sample is 144 years old.
Explanation:We are given half life which is 72 years.
id say theres a good plenty!
Answer:
(A) 19 bars
Explanation:
First off, we calculate the mass of platinum contained in one 1 L bar. To do that we convert 1 L into cm³ -1 L equals to 1000 cm³-.
21.4 g/cm³ * 1000 cm³ = 21,400 g
Each bar of platinum weighs 21,400 grams.
Now we convert the maximum payload capacity of the truck, into grams (1 lb equals to 453,592 g):
![900lb*\frac{453,592g}{1lb}=408232.8g](https://tex.z-dn.net/?f=900lb%2A%5Cfrac%7B453%2C592g%7D%7B1lb%7D%3D408232.8g)
Then we divide the weight of one bar by the maximum payload capacity:
408232.8 / 21400 =19.09
Thus the thieves could carry 19 1 L bars