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
antiseptic1488 [7]
4 years ago
7

If U-235 has a half-life of 713 million years and the age of the sample is 2.631 billion years old then how many half-lifes has

this sample undergone (Answer to 2 decimal places)
Mathematics
2 answers:
lutik1710 [3]4 years ago
8 0
<span>As the age of the U-235 sample is 2.631 billion years, and the half-life of U-235 is 713 million years, the sample has undergone 2.361 X 1,000,000,000 / 713 X 1,000,000 = 3.69 half lives. In each half-life the sample reduces to half its original weight according to the radioactive Half-Life Formula: ln (Nt /N0) = -kt, where N0 = mass of the original weight of radioactive material, Nt = mass of radioactive material at time t, k = decay constant and t = time interval . We have to put Nt/N0 = 1/2 for time interval = half-life.</span>
OverLord2011 [107]4 years ago
5 0

Answer:

i have no clue sorry

Step-by-step explanation:

You might be interested in
What is the value of 38.07÷9.4. <br><br>F)0.1453<br>G)1.453<br>H)14.53<br>I) 145.3
Natasha_Volkova [10]
I'm pretty sure the answer is G. I'm not 100% sure tho. Hope this helps! :)
5 0
4 years ago
Need help!
Leya [2.2K]

9514 1404 393

Answer:

  • clockwise
  • 90°
  • origin

Step-by-step explanation:

The answer statement tells you the transformation is a rotation. The original is in the 2nd quadrant, and the image is in the 1st quadrant, representing a clockwise rotation. AB points east, while A'B' points south, a rotation of 90° (clockwise). Each image point is the same distance from the origin as its preimage point. The origin is the center of rotation.

__

∆ABC is transformed by a <u> clockwise </u> rotation <u> 90 </u> degrees with a center at the <u> origin </u>.

6 0
3 years ago
The base of each pyramid is an isosceles triangle. Which has the greater surface area?
Semenov [28]
The base is the greatest surface area
8 0
3 years ago
Can someone solve the equation?<br> n+3/4=1/4
slavikrds [6]

Answer:

n+3/4=1/4

n+3/4 - 3/4=1/4-3/4

n = -2/4 = -1/2

Step-by-step explanation:

n+3/4=1/4

n+3/4 - 3/4=1/4-3/4

n = -2/4 = -1/2

4 0
3 years ago
4n^2-22=27 please show work
shepuryov [24]

Answer:

n = 7/2

Step-by-step explanation:

4n^2-22=27

4n^2 = 27 + 22

4n^2/4 = 49/4

sqrtn^2 = sqrt(49/4)

n = 7/2

3 0
3 years ago
Other questions:
  • Find the volume of a rectangular crate with dimensions 3 ft by 4 ft by 8 ft.​
    12·2 answers
  • What is the decimal of 4 1/5​
    12·2 answers
  • Tan C= <br> Help help help
    9·2 answers
  • Estimate 15.870 + 6.77 by first rounding each number to the nearest tenth​
    11·1 answer
  • Consider function f. f(x) = sqrt 7x- 21
    14·2 answers
  • Write in slope intercept form (y=mx+b) when the m is 2/3 and b is -4
    14·2 answers
  • Solve: x/2 = -10<br> the / means divided
    13·1 answer
  • Bryan spent 14 minutes on the phone while routing 7 phone calls. How many phone cells does Bryan have to route to spend a total
    8·1 answer
  • Find the length of the missing side.
    13·1 answer
  • Х+бу =20<br> x+3y = 14<br> Solve the simultaneous equations
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!