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
Ghella [55]
3 years ago
15

An isotope has a half life of 102 years. How much of a 22gram sample is left after 250 years?

Mathematics
2 answers:
mestny [16]3 years ago
6 0

A half life of 102 years means a decay formula something like

A = A_0 \times 2^{-t/102}

When t=250,

\dfrac{A}{A_0} = 2^{-250/102} \approx 0.182886

Answer: 18.3%



Svetach [21]3 years ago
6 0
The formula for finding the half life is

Final amount= initial amount * 0.5^(time/half life)

Final amount = 22*0.5^(250\102)
= 22^0.5^(2.4509..)
= 22*0.18288..
= 4.02350054
=4.02g

Hope this helps!
You might be interested in
Which of the following sequences are convergent
Schach [20]

Answer:

option A  and E

Step-by-step explanation:

Arithmetic sequence converge,  only  in the case only when r=0

otherwise , arithmetic sequence goes increasing or decreasing at a constant rate.

So we ignore second and fourth option

If |r|<1 then geometric sequence converge

if |r|>1 then geometric sequence diverge

In option A, r= 1/5  that is less than 1  so it converge

In option C, r= -2 , |r| > 1 so geometric sequence diverge

In option E, r= 2/3 that is less than 1  so it  converges

Answer is option A  and E




3 0
3 years ago
30 POINTS FOR THIS ONE
satela [25.4K]

Answer:

1. 0.5

2. 3/4

3. -6

4. 5x

Step-by-step explanation:

1. A coefficient is a number that is placed in front of an algebraic term/variable in an expression or equation.

The decimal coefficient is therefore 0.5. It is the coefficient of x.

2. The fractional coefficient is 3/4. It is the coefficient of y.

3. The negative coefficient is -6. It is the coefficient of b.

4. A like term is one which contains the same type of terms as another term.

3x is a like term of 5x, because it contains a numerical term and an algebraic term to the power of 1.

5 0
3 years ago
Scott is four more than double the age of Todd. Scott is 56. What is Todd's age?
SSSSS [86.1K]

Answer: 26 years old

Step-by-step explanation:

Since Scott is four more than double the age of Todd, start by taking away four from Scott's age.

56-4=52

Then take half of that because that would be double of Todd's age

52/2=26

Todd is 26 years old.

5 0
2 years ago
If pie is round then does that mean its also pi(3.14)
Papessa [141]

Answer:

no because if your talking about like pumpkin pie or apple pie the the pie or pie tin has a circumference when pi 3.14 is an ongoing number.

5 0
2 years ago
Read 2 more answers
Match the factored form
Brut [27]
(3x - 8)(3x + 8) is 3.) 9x^2 - 64
(x + 6)^2 is 4.) x^2 + 12x + 36
(3x - 2)(x + 5) is 1.) 3x^2 + 13x - 10
5x(x - 1)(x + 7) is 2.) 5x^3 + 30x^2 - 35x
(x - 8)(x + 7) is 5.) x^2 - 10x + 16

I hope this helps!
7 0
3 years ago
Other questions:
  • The lengths of the sides of the base of a right square pyramid are 3 feet, and its slant height is 8 feet. If the sides of the b
    13·1 answer
  • 1) Tickets to a fundraiser are $14 if purchased ahead of time and $25 if
    12·2 answers
  • A movie theater has 288 seats if each row has 16 how many rows in the movie theater
    11·2 answers
  • I need help i added an attachment and have most of it done and now i am just stuck on what to do now please help me.
    12·2 answers
  • 5-2(x+2)=12 <br> Decimal Form and work under the problem too HURRY!!!1
    13·1 answer
  • Please help me out on this !
    6·2 answers
  • Avery has a points card for a movie theater. She receives 75 rewards points just for signing up. She earns 6.5 points for each v
    11·2 answers
  • Complete the synthetic division to find the quotient of 3x^3-25x^2+12x-32 and x-8
    9·1 answer
  • A man invests in a bank he gets 3% per year compound interest his final balance is £10927.27 after 3 years what was his investme
    6·2 answers
  • Which of the following is equivalent to (mn)3? (5 points)
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!