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 much money has to be invested at 3.3% interest compounded constinuously to have $45,00 after 19 years
Sedaia [141]
P=$24038.60 has to be invested to have $45000 after 19 years
3 0
3 years ago
Read 2 more answers
Joong Ki paid a total of ₱90 for 6 singkamas and 11 ponkans. If a singkamas and a ponkan cost ₱10, how much does each cost? ANSW
Serggg [28]

Step-by-step explanation:

singkamas: 60 pesos

ponkan: 110 pesos

5 0
2 years ago
The function, f(x) = –2x2 + x + 5, is in standard form. The quadratic equation is 0 = –2x2 + x + 5, where a = –2, b = 1, and c =
avanturin [10]
Given:

The function, f(x) = -2x^2 + x + 5

Quadratic equation: 0 = -2x^2 + x +5
where a = -2
            b = 1
            c = 5

The discriminate b^2 - 4ac = 41

To solve for the zeros of the quadratic function, use this formula:

x = ( -b +-√ (b^2 - 4ac) ) / 2a

x = ( 1 + √41 ) / 4  or 1.85
x = ( 1 - √41 ) / 4  or -1.35

Therefore, the zeros of the quadratic equation are 1.85 and -1.35. 
4 0
3 years ago
Read 2 more answers
(a) The perimeter of a rectangular garden is 304 m.
kupik [55]

Answer:

oof

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Please help quickly! 20 points
scZoUnD [109]

Answer:

y+3 = 4(x+3)

Step-by-step explanation:

its this answer because to find point slope form you have to do y1 - y2 and in the coordinate provided, -3 is y so y- (-3) or y+3 hope this helped ^u^

5 0
3 years ago
Other questions:
  • How many minutes will it take the school bus to complete the 52-km trip back to the school at an average speed of 1.0 km/min?
    11·1 answer
  • Solve the system of inequalities y>x+5 y<2x+2
    13·1 answer
  • 32 divided by 8 what is the answer?
    13·2 answers
  • Mr Turner buys 12 pencils for $0.57 each . He pays with a $10 bill how much change would he revive
    11·2 answers
  • The length and width of a rectangle are in a 3:11 ratio. The area
    8·1 answer
  • 1120 in exponential form
    15·2 answers
  • Can someone please help with these question
    5·1 answer
  • According to studies in the past 40% of all us adults attend chruch regularly the gap period the Gallup hole asa random sample o
    9·1 answer
  • Which of the following statements is TRUE?
    13·1 answer
  • In a Parallelogram CARS , <C = 5x-20 and <A = 3x+20. Find the value of x ?​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!