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
fgiga [73]
3 years ago
5

A radioactive substance has a continuous decay rate of 0.056 per minute. How many grams of a 120 gram sample will remain radioac

tive after 40 minutes? Round the answer to the nearest tenth of a gram, and do not include the unit in your answer.
Mathematics
1 answer:
sammy [17]3 years ago
5 0

Answer:

The mass of the radioactive sample after 40 minutes is 12.8 g.

Step-by-step explanation:

The mass of the sample can be found by using the exponential decay equation:

N_{t} = N_{0}e^{-\lambda t}

Where:

N(t): is the amount of the sample at time t =?

N₀: is the initial quantity of the sample = 120 g

t = 40 min

λ: is the decay constant =  0.056 min⁻¹

Hence, the mass of the sample after 40 min is:

N_{t} = N_{0}e^{-\lambda t} = 120g*e^{-0.056min^{-1}*40 min} = 12.8 g

     

Therefore, the mass of the radioactive sample after 40 minutes is 12.8 g.

I hope it helps you!

You might be interested in
Which graph represents and exponential function?
Sati [7]

Answer:

Velocity time graph represent and exponential function

3 0
2 years ago
The two sets of data below show the number of bubbles blown in fifty trials using two different bubble solutions.
storchak [24]

Answer:

d

Step-by-step explanation:

i got it right

5 0
3 years ago
Read 2 more answers
What is the length of BC⎯⎯⎯⎯⎯ ?<br><br><br> Enter your answer in the box.
Rudiy27

Answer:

  \overline{\text{BC}}=\boxed{22}

Step-by-step explanation:

The angle marks mean those angles have the same measure. That means the sides opposite them have the same measure, so ...

  2x -24 = x -2

  x = 22 . . . . . . . . . add 24-x

The length of BC is x, so is 22.

BC = 22

8 0
3 years ago
Janelle ate 4/5 of her graham cracker. Paul ate 3/5 of his graham cracker. The graham crackers were the same size.
sergij07 [2.7K]
1/5 less than janelle
6 0
3 years ago
Find the first four terms of the sequence given a1=18 and an+1=2+an/2.
EleoNora [17]

Answer:

Step-by-step explanation:

hello

a_1=18\\\\a_2=2+\dfrac{a_1}{2}=2+\dfrac{18}{2}=2+9=11\\\\a_3=2+\dfrac{a_2}{2}=2+\dfrac{11}{2}=\dfrac{4+11}{2}=\dfrac{15}{2}\\\\a_4=2+\dfrac{a_3}{2}=2+\dfrac{15}{2}=\dfrac{4+15}{2}=\dfrac{19}{2}

hope this helps

7 0
3 years ago
Read 2 more answers
Other questions:
  • Please help!<br><br> Answers:<br> 15<br> 70<br> 55<br> 105
    14·1 answer
  • Susan is choosing a 2-letter password from the letters A, B, C, D, and E. The password cannot have the same letter repeated in i
    13·2 answers
  • The term for the type of people of degrees earned by a group of people is?
    15·2 answers
  • Can somebody please help me ( picture above )
    11·2 answers
  • Help ASAP plz and put how to solve it
    15·1 answer
  • How do u graph x&gt;4 on a x and y graph?
    11·1 answer
  • 9 pencils cost $7.74<br> Which equation would help determine the cost of 6 pencils?
    15·2 answers
  • WHICH OF THE FOLLOWING REPRESENTS A NON LINEAR EQUATION
    14·1 answer
  • A bag contains 3 red,4 green, and 5 blue marbles. Three marbles are drawn at random. What is the probability that all three are
    8·1 answer
  • Find the measure of angle A.<br> A<br> 9x+6<br> 4x + 6<br> m/A=
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!