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
Tatiana [17]
2 years ago
14

Carbon–14 is a radioactive isotope that decays exponentially at a rate of 0.0124 percent a year. How many years will it take for

carbon–14 to decay to 10 percent of its original amount? The equation for exponential decay is At = A0e–rt.
Mathematics
1 answer:
patriot [66]2 years ago
5 0
100-0.0124=99.9876

10%=1/10
1/10P=P(0.999876)^t
divide both sides by P
1/10=0.999876^t
take ln of both sides
ln(1/10)=t (ln(0.999876))
divide both sides by (ln(0.999876))
ln(1/10)/(ln(0.999876))=t
use calculator
18568.08=t
about 18568 years

You might be interested in
A salesperson at a jewelry store earns 4​% commission each week. Last​ week, Heidi sold $680 worth of jewelry. How much did make
Charra [1.4K]

Answer:

$27.2

Step-by-step explanation:

680x0.04=. 27.2

She made $27.2 last week

8 0
3 years ago
An Olympic-size swimming pool holds 2,500 kiloliters of water. After swimmers splash water out of the pool, there are 24,500 hec
ycow [4]
There are 25,000 hectoliters in 2,500 kiloliters. So, subtract 25,000-24,500 and you have your answer, which is 500 hectoliters. :)
6 0
2 years ago
Factor the trinomial:<br><br> -2x²-16x-24
Liula [17]
-2x^2-16x-24&#10;&#10;
<u />-2x^2-12x-4x-24
-2x(x+6)-4(x+6)
(-2x-4)(x+6)
-2(x+2)(x+6)
8 0
2 years ago
Express each of the as the sum of a whole number and a fraction .
Alla [95]

im not 100% sure if my answers are right but heres what i got:


b. 3 and 1/2

d. 2 and 1/3 (or 2 3/9)

3 0
3 years ago
Read 2 more answers
Paulina's family is going on a vacation. Their destination is 862 miles from home. The following events happen in order. The fam
Luden [163]

Answer: 88

Step-by-step explanation:

8 0
2 years ago
Other questions:
  • Which of the following equations represents the perpendicular bisector of WX graphed below?
    7·1 answer
  • There are 25 quarts of water in a bucket. If you want to bottle it in 1/2 quart bottles, how many bottles do you have
    13·2 answers
  • -3 1/5 ÷ 1 3/4<br> Write your answer as a mixed number in simplest form.
    14·1 answer
  • State any restrictions
    14·1 answer
  • 1. Marla coloured 1/4 of a picture, and Suman painted some, too. When they were finished, 2/3 of the picture still needed to be
    14·1 answer
  • 6
    10·2 answers
  • Find the missing angle.
    15·1 answer
  • I WILL GIVE BRAINLIEST!!!
    14·1 answer
  • ABCD is a rhombus. Find AB. Give answer as a fraction in simplest form.<br>​
    10·2 answers
  • IOr — 5г + 3r — 8г i need help
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!