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
Tems11 [23]
3 years ago
11

An isotope decays at a rate of -0.0049% per year. Find the half life. (show the work)

Mathematics
1 answer:
cricket20 [7]3 years ago
7 0

Answer:

  14,146 years

Step-by-step explanation:

The annual multiplier is (1 -0.0049%) = 0.999951. We want to find the number of times this needs to be multiplied to make the product 1/2.

  0.5 = 0.999951^t

  log(0.5) = t·log(0.999951)

  log(0.5)/log(0.999951) = t ≈ 14,145.514

The half-life is about 14,146 years.

You might be interested in
How do I work this out oof
kakasveta [241]

I am so sorry for giving you the wrong answer at first.

Here's the processs

1x=-0.5555

Move the decimal point in the repeating decimal one space forward

10x=-5.55555

Then subtract

10x=5.5555

x=-0.5555= 9x=-5

Divide both sides by 9

9x=-5

9x/9=-5/9

-5/9 is your final answer!

Hope this helps!

7 0
3 years ago
Read 2 more answers
100 <---- 2 zeros
Tom [10]
The number 100 -> that has 2 zeros
Is the same as 10^2 as for this simplified is equal to 100.
100=100
They are the same. They have the same number of zeros.
4 0
3 years ago
Will mark brainliest if correct and you show your work.
Ksivusya [100]

Answer:

4(9x^4+1858)

Step-by-step explanation:

36 x^4 + 18^3 + 40^2

36x^4+7432

4(9x^4+1858)

7 0
3 years ago
If the radius is increased by a factor of three, how many times the volume of the small sphere is the large sphere? *
dusya [7]

Answer:

27

Step-by-step explanation:

8 0
3 years ago
1<br> Solve:<br> -8–2k=-2(k+4)
Olegator [25]

Answer:

zero=0

Explanation:

-8-2k=-2(k+4)

-8-2k=-2k-8

-2k+2k=-8+8

zero=0

4 0
3 years ago
Other questions:
  • A cube has edge length s units. Use an exponent to write an expression for its volume
    9·1 answer
  • How to answer this question
    11·2 answers
  • 52÷875 as a mixed number with an explanation.
    8·2 answers
  • Please help! I do not understand.
    14·2 answers
  • What's the difference between -1/2 and 1/6
    13·1 answer
  • Please help!!!
    6·1 answer
  • The populations of Cities A and B are 1.6 x 10^5 and 1,070,000​, respectively. The population of City C is twice the population
    13·1 answer
  • 410x44 with parshal product
    11·1 answer
  • Which of the following equations will form a system with the same solution as the above set of equations?
    12·1 answer
  • A table lamp emits light in the shape of a hyperbola. If the hyperbola is modeled by the equation 25x2 – 144y2 + 3,600 = 0, whic
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!