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
bekas [8.4K]
3 years ago
7

If a radioactive substance's half-life is 20 years, how much of a 40-gram sample will be left after 60 years?

Biology
2 answers:
umka21 [38]3 years ago
7 0

The answer is C. 20 grams.

gavmur [86]3 years ago
6 0
20 is your answer
hope this helps
You might be interested in
Wich event will follow dna replication in a cell cycle
jekas [21]
DNA replication occurs in the S phase. After that is G2, which is growth and final preparations for division. Chromosomes are checked for errors and repairs are made if needed. Essentially, the cell prepares for division.
5 0
3 years ago
The _____ is a pair of seahorse-shaped structures in the brain that play a central role in memory.
Vlad1618 [11]
Hippocampus is the answer
8 0
3 years ago
The ability of solid rock to flow is called ___
Trava [24]
The answer is plasticity
5 0
3 years ago
Read 2 more answers
During chemistry class your teacher challenged you to dissolve four salts as quickly as possible in a specific volume of water.
BlackZzzverrR [31]
Your answer would be A. :)
5 0
3 years ago
Read 2 more answers
What would be the correct sequencing of DNA to match A, T, T, G, C
Marianna [84]

Answer:

A.

Explanation:

The correct sequencing of DNA nucleotides to match A, T, T, G, C is T, A, A, C, G because the nucleotide matches are: Adenine-Thymine, and Guanine-Cytosine. This works both ways, A-T or T-A, and G-C or C-G. The correct sequence therefore is A.

3 0
3 years ago
Other questions:
  • When microscopes were first used hundreds of years ago, scientists discovered that a single drop of water contains
    11·2 answers
  • Which is the first step to occur during the process of replication?
    13·1 answer
  • An increase in the biodiversity of an ecosystem leads to an increase in its productivity T or F
    10·2 answers
  • Explain why it is important to monitor ecosystems over long periods of time?
    13·1 answer
  • What will a hypothesis become if it is support by repeated experimentation
    15·2 answers
  • Would you say glucose or sucrose is more complex why
    5·1 answer
  • You have a batch of tomato plants with hairy stems that you grew by crossing plants that had hairy stems (HH) with plants that h
    13·2 answers
  • Can anyone help me out here? This is the final question I have to do, and it is really hard and it is due at 5:00!
    8·2 answers
  • You are examining a human blood smear under the microscope and note a large cell with a bilobed nucleus and orange-red granules
    8·1 answer
  • What are the small air sacs called that exchange gases in the lungs? valves chambers alveoli nodes.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!