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
What is 3,000 is ___ times as muchas 30.
Katen [24]
The answer would be 100 because 100x30 equals to 3,000

I hope this is the answer you were looking for
7 0
3 years ago
What is the ninth triangular number?
earnstyle [38]
27 I think..... Oh darn I'm replying to my self
5 0
3 years ago
Does anyone know the answer for both of these
ASHA 777 [7]
19 is 13 and 20 is 22
3 0
3 years ago
-y= 4x + 1
ivolga24 [154]

Answer:

I believe the answer would be C.

Step-by-step explanation:

This is because after plugging in the numbers (2 in replace of x) (-9 in replace of y) for the problem -2y- 6x =6... the statement was determined true.... so, therefore, I believe the correct answer is C

6 0
3 years ago
Simplify using log properties: −log1/100 <br> -10 <br> 2 <br> -2 <br> 1/2
Andreyy89

The answer is 2 .

simplify log(down)10 (1/100) : -2

apply log rule : -log(down)10 (100)

rewrite 100 in power-base form : -log(down)10 (10^2)

apply log rule again : -2log(down)10 (10)

apply one more time : -2*1

Multiply : -2

refine from -(-2) = 2

I hope this helps





5 0
3 years ago
Other questions:
  • At Garcia's Bike Rentals, it costs $22 to rent a bike for 5 hours. How many hours of bike use does a customer get per dollar?
    10·1 answer
  • We can describe 12x – 8 as an expression.
    8·1 answer
  • Consider the equation.<br> 35 +<br> = 7(5+3)
    10·1 answer
  • Angel bought a 4 cups of freshly squeezed lemon juice. Be used 1/3 of a cup while making homemade lemonade. How many cups of lem
    7·1 answer
  • A circle has a cincumarence of 907 16 units,What is the diameter of the circle?
    8·1 answer
  • A bell tower casts a 60 cm shadow. At the same time a sculpture that is 4.5 meters tall casts a
    9·1 answer
  • Pleaseeeee helppppp I’ll mark you brainlist
    15·1 answer
  • 4/1 = 12/y ​what does y= its on khan academy
    12·1 answer
  • A class is collecting aluminum cans. Every Monday each student brings in a bag with 10 cans. They put 10 bags into a box. How ma
    7·1 answer
  • (y−2)=3(x−1) whats the slope
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!