This is incorrect, it should not be hace twice
Question 1 answer: la pelota
Question 2: el juguete
Question 3: piscina: ir al cine
Question 4: equipo
Question 5: ir de excursión
Question 6: ir al cine
Question 7: el campeón
Question 8: para jugar un partido de baloncesto
Question 9: doce
Question 10: hay un partido contra otro equipo
Question 11: for actions completed in the past
Question 12: habló
Question 13: estudié
Question 14: asistimos
Question 15: fue
Question 16: llegué
Question 17: comistes
Question 18: alcancé
Question 19: abarqué
Question 20; cayó
Question 21: estudiaron
A. mi suegra is the answer
Answer:
The half life of an isotope is the time that an element take to reduce the half of the mass.
Explanation:
So for example,in the case of carbon 14, one gram takes 5730 years to reduce to 0.5 g, and then, it takes another 5730 years to be reduced to 0.250 g and so and so.
So depending the mass of the sample that you have, for example, a bone that weights 15 g, it will take 5730 years to have a mass of 7.5 g, and then 11, 460 years to have a mass of 3.75 g, and then 17,190 years to have a mass of 1.875 g, and so, and so.
Hope this info is useful.
