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
Pavel [41]
3 years ago
12

a 23 gram sample of a substance thats a by-product of fireworks has a K-value of .13. whats the substances half life in days

Mathematics
2 answers:
Rzqust [24]3 years ago
6 0

Answer:

5.3 is the right answer.

Step-by-step explanation:

nata0808 [166]3 years ago
3 0
Given:
Initial mass, m₀ = 23 g
Decay constant, k = 0.13

Exponential decay obeys the equation
m(t)=m_{0} e^{-kt}
where t = time, days

For half life, the mass is m = m₀/2.
Therefore
e^{-0.13t} = \frac{1}{2} \\ -0.13t = ln(0.5)\\t= \frac{ln(0.5)}{-0.13} =5.33

Answer: The half life is 5.33 days
You might be interested in
Find the value of X.
noname [10]

Answer:

ummmmm if im not wrong 34

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Solve the system (picture) by substitution
Westkost [7]
Try out all of your options by filling the the x and y values from each option. You can use either of the two equations to solve

1) 2(2)+3(3) does not equal 5
2) 2(3)+3(2) does not equal 5
3) 2(3)+3(-2) does not equal 5
4) 2(-2)+3(3) equals 5
4.5) Double check your answer by doing the same thing for the second equation // 3(-2)+2(3) does equal zero.

D
6 0
3 years ago
Calculate the volume of the triangular pyramid below.
eduard

Answer:

90

Step-by-step explanation:

1/2x10x3.6=18

18x5=90

8 0
2 years ago
Happy Monday Everybody<br><br><br> Free 100 points no joke
vlabodo [156]

Answer:

Thank you

Step-by-step explanation:

Have a great day :D

5 0
2 years ago
Read 2 more answers
Find a fraction equivalent to 5/7 whose squared terms add up to 1184.
bogdanovich [222]

The system of equations of two unknowns is formulated and solved.

\large\displaystyle\text{$\begin{gathered}\sf \bf{ \left\{\begin{matrix} \ \ \ \dfrac{x}{y} = \dfrac{5}{7} \\ x^2+y^2 = 1184 \end{matrix}\right. \ \Longrightarrow \ x=\dfrac{5}{7}y  } \end{gathered}$}

\large\displaystyle\text{$\begin{gathered}\sf \bf{ \left (\dfrac{5}{7}y \right )^2+y^2=1184\ \Longrightarrow\ 25y^2+49y^2=58016 } \end{gathered}$}

                                                              \large\displaystyle\text{$\begin{gathered}\sf \bf{74y^{2}=58016} \end{gathered}$}\\\large\displaystyle\text{$\begin{gathered}\sf \bf{ \ \  \ \ \ \ y^{2}=784 } \end{gathered}$}\\\large\displaystyle\text{$\begin{gathered}\sf \bf{ \ \ \ \ \ y=\pm\sqrt{784}=\pm28  } \end{gathered}$}

                                                                  \large\displaystyle\text{$\begin{gathered}\sf \bf{ x=\dfrac{5}{7}(\pm 28)=\pm 20  } \end{gathered}$}

The fraction that satisfies the request is \bf{\dfrac{20}{28}} , since in \bf{\dfrac{-20}{-28}} the negative signs are canceled and the first fraction is obtained.

3 0
1 year ago
Other questions:
  • Which of the following is the explicit formula for the sequence below 3,11,19,27
    9·1 answer
  • find three consecutive integers such that the sum of the first and twice the second is equal to the third plus four​
    6·1 answer
  • Make a the subject of V^2+U^2+2as
    9·1 answer
  • Find the ratio in simplest form 2/3 to 3/2
    8·1 answer
  • Whats the answer 6+1
    14·2 answers
  • Debbie's town voted on a new speed limit. Out of 17 votes, 17 were in favor of the new speed limit. What percentage of the votes
    9·1 answer
  • B) Is the relation a function? Use the vertical line test to decide.
    8·1 answer
  • F(x) = -4x2 + 19<br> Find f(-7)
    6·1 answer
  • Help me please asap<br> i will make you brainliest
    14·1 answer
  • HELP ASAP!!!!PLEASE
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!