1) Maggie shook 100 pennies in a container and counted how many landed heads up. Approximately what fraction of pennies would you expect to land heads up? a) 1/4

b) 1/2

c) 3/4

d) 4/4

2) If three half-lives have passed, what fraction of the isotopes will still be parents?

a) 1/2

b) 1/4

c) 1/8

d) 1/16

3) A sample has a half-life of 1000 years. 1/4 of the isotopes are parents. How old is it?

a) 250 years

b) 500 years

c) 2000 years

d) 4000 years

4) A sample has a half-life of 1 million years. 1/8 of the isotopes are parents. How old is it?

a) 250,000 years

b) 500,000 years

c) 2 million years

d) 3 million years

(answer all and I will mark your answer the brainliest or you can just answer one)

the answer is stop cheating on things stoopid

step-by-step explanation:

im eatin up the 44

i believe the correct answer is option 4.principalities were small territories that were run by russian rulers.

which statement correctly defines principalities in northern asia in the 1200s? principalities were small territories that were run by russian rulers.

hope i could ! : )

answer: ay  

fonsi  

dy  

oh

oh no, oh no

oh yeah

diridiri, dirididi daddy  

go

sí, sabes que ya llevo un rato mirándote  

tengo que bailar contigo hoy (dy)  

vi que tu mirada ya estaba llamándome  

muéstrame el camino que yo voy (oh)

tú, tú eres el imán y yo soy el metal  

me voy acercando y voy armando el plan  

solo con pensarlo se acelera el pulso (oh yeah)

ya, ya me está gustando más de lo normal  

todos mis sentidos van pidiendo más  

esto hay que tomarlo sin ningún apuro

despacito  

quiero respirar tu cuello despacito  

deja que te diga cosas al oído  

para que te acuerdes si no estás conmigo

despacito  

quiero desnudarte a besos despacito  

firmo en las paredes de tu laberinto  

y hacer de tu cuerpo todo un manuscrito (sube, sube, sube)

(sube, sube)

answer: 0.26

i used the calculator on google