1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Elena-2011 [213]
3 years ago
15

A radioactive element has a half-life of 1000 years. A rock contains 6.25% radioactive material. How old is the rock?

Biology
1 answer:
Natali5045456 [20]3 years ago
7 0

ANSWER:

Radioactive element life years = 1000/2 = 500yrs.

So, Rock years

  • 6.25/100 × 500
  • 31.25years.
You might be interested in
You are operating a powerboat at night. Your red sidelight must be visible to boats approaching from which direction(s)?
Degger [83]
I believe the answer is head-on and port (left). The side lights are usually visible to vessels approaching from the front or the side. The red light usually indicates a vessel's port (left) side while the green light indicates a vessel's starboard (right) side. These lights ensure that there is safety at night as the vessels navigate.
8 0
4 years ago
Read 2 more answers
How much available energy is lost when a carnivore consumes an herbivore
AysviL [449]
Each time an organism is consumed, 90% of the energy is lost as heat. that leaves only 10% for the carnivore
5 0
3 years ago
Read 2 more answers
Which state of matter is most likely represented in the diagram shown below?
insens350 [35]

The picture below represents; A. Gas

5 0
3 years ago
Read 2 more answers
1. According to Keller Larry it is the process by which governance is done.
andrew11 [14]

politics because politics is one of the major things

3 0
3 years ago
9. (ENEM-2005) Um problema ainda não resolvido da geração nuclear de eletricidade e
tatiyna

يعينك على خير ان شاءالله يارب وياك يارب وياك يارب وياك يارب وياك يارب وياك يارب وياك يارب وياك يارب وياك يارب وياك يارب وياك يارب وياك يارب وياك يارب وياك

8 0
3 years ago
Other questions:
  • which of the following contain the most nutrients. A.apple juice B.chopped apple C.whole apple D.grated apple
    7·2 answers
  • Neap tides, relatively weak tides, occur when the Moon is in position(s)
    10·2 answers
  • A mixture of the amino acids leucine, glutamate, and arginine, is added to a cation exchange column at neutral ph. in what order
    5·1 answer
  • In the Brookhaven beetle, straight antenna(S) are dominant over curly antenna(s). Green wings(G) are dominant over red(g).A beet
    14·1 answer
  • When you are frightened by something, what part of the brain directs your body to react by making your heart beat faster and inc
    5·1 answer
  • Rita was all ears when Lee told her the secret. Lee knew that Rita would not spill the beans. Rita has always been a true friend
    10·2 answers
  • Natural disasters can also play a huge role in changing selection pressures for a species. How could a natural disaster cause a
    15·1 answer
  • Which animal is it I am confused
    5·1 answer
  • Help, needed. Its for a grade and im confused.
    5·2 answers
  • Which cell type divides fastest? (in order)
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!