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
Genrish500 [490]
3 years ago
9

Hpw to find exponential decay equation of radioaxtive subsrance

Mathematics
1 answer:
max2010maxim [7]3 years ago
5 0
I believe you are referring to the half-life formula, which is used to calculate the half-life (when the substance drops to half of its original amount) of radioactive substances.  The equation is as follows: A = P(.5)^{t/h}

<em>A</em> is the remaining amount
<em>P</em> is the initial amount
<em>t</em> is the time that has passed
<em>h</em> is the half-life of the substance

When plugging values into the equation, make sure that <em>t </em>and <em>h </em>are both measured in the same unit (e.g. <em>t </em>days and <em>h </em>days), as well as <em>A </em>and <em>P</em>.
You might be interested in
A roulette wheel has 37 numbers (0 through 36).
NeX [460]

\large\boxed{\frac{1}{1369}}

We'll assume that there is an equal probability of any position on the wheel, so a \frac{1}{37} chance for any given number.

We must take the probability of getting a 27, then the probability of getting a 15, and multiply them together to find the chances that they both happen in a row.

\frac{1}{37}\cdot\frac{1}{37}=\boxed{\frac{1}{1369}}

5 0
2 years ago
What is the slope of the line given by the equation y=-7X? O A 7 OB. 7 O c. -7 O D. 7​
Anna007 [38]

Answer:

C. -7

Step-by-step explanation:

See the picture for steps :)

6 0
2 years ago
Which method or methods listed below describe a solid system for keeping financial records? I. Making a mental note of all purch
Nikitich [7]

Financial records  are important records and thus, needs to be saved safely. The method for solid system to keep it is: Option d. I, II, and III

<h3>How to safely keep financial records and why?</h3>

Financial records are records of all financial transactions and receipts. They're needed for future cases like some contradictions, to get past details, to analyze data to make prediction about future sale and for development of the organization etc.

For keeping them, they should be saved in an easily accessible, and hardly destroy-able place. So that its prevented safely but accessible faster with correct authentication.

For the given case, for solid system for keeping financial records, we can actually follow all the three steps provided.

I. Making a mental note of all purchases made during the week. II. Recording money spent in a hand-held notebook. III. Organizing receipts and transactions on a computer.

Thus,

The method for solid system to keep it is: Option d. I, II, and III

Learn more about financial records here:

brainly.com/question/4954869

7 0
2 years ago
~Factorise~ : x³ + 4x<br>with the steps​
GrogVix [38]

Answer:

x (x^2+4)

Step-by-step explanation:

See the steps below:)

6 0
3 years ago
Which calculation should be used to calculate s9 for the arithmetic sequence an=3n-1
Ganezh [65]

Answer: Choice A

S9 = (9/2)*(2+26)

===============================================

The formula is

Sn = (n/2)*(a1+an)

where

Sn = sum of the first n terms (nth partial sum)

n = number of terms

a1 = first term

an = nth term

In this case,

n = 9

a1 = 2 (plug in n = 1 into the formula an = 3n-1 and simplify)

an = a9 = 26 (plug n = 9 into the formula an = 3n-1 and simplify)

So,

Sn = (n/2)*(a1+an)

S9 = (9/2)*(2+26)

will help us find the sum of the first 9 terms of this arithmetic sequence

7 0
3 years ago
Read 2 more answers
Other questions:
  • A mountain climber climb 15840 feet on her way to the summit of a mountain how many miles did she climb?
    11·1 answer
  • SOMEONE HELP PLS I NEED HELPPPPPPP
    6·1 answer
  • What is the slope of the line that passes through each points (5,3), (6,9)
    9·2 answers
  • 4. What is the correct simplified form? See picture
    9·1 answer
  • Help asap please!!..
    15·1 answer
  • Please help me find the missing measurement!
    14·2 answers
  • oe and Ted are both running laps. Joe is running at 10 minutes per lap, and Ted is running at 12 minutes per lap. A photographer
    8·2 answers
  • Can someone help me out
    11·1 answer
  • Can somebody help me with my work please????
    11·1 answer
  • Natalie has 412 apples that she must package into bags. Each bag must hold 8 apples. Natalie divides 412 by 8 and gets an answer
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!