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
Elena L [17]
3 years ago
10

Find the substance's half-life, in days. Round your answer to the nearest tenth.

Mathematics
1 answer:
shutvik [7]3 years ago
4 0

Answer:

t = 5.6 day

t =5 days 14 hours 24 minutes

Step-by-step explanation:

Half life is the time it will take for the original value or quantity I'd a particular substance to decrease by half of it's original self.

N = N•e(-kt)

N• = 25

K = 0.1229

Then

N = 25/2 = 12.5

The reason because at the half life , it's original value will decrease to half.

Let's solve for the half life t

N = N•e(-kt)

12.5 = 25e(-0.1229t)

12.5/25 = e(-0.1229t)

0.5 = e(-0.1229t)

In 0.5 =-0.1229t

-0.69314 = -0.1229t

-0.69314/-0.1229 = t

5.6399 = t

To the nearest tenth

5.6 days = t

You might be interested in
What number is 16% of 44 rounded to the nearest tenth show the work also and thxs
OLEGan [10]
SOLUTION:

16% of 44 = 44 × 16% OR 44 × 16 / 100 OR 44 × 0.16

16% of 44 = 7.04

16% of 44 = 7.0 ( rounded to the nearest tenth )

Hope this helps! :)
Have a lovely day! <3
7 0
3 years ago
In a box of 500 colored balls, 75 are black, 150 are green, 175 are red, 70 are white, and 30 are blue. what are the probabiliti
Oksanka [162]
If we want to select a ball of each colour we have to extract 175+150+75+70+1=471 balls

P=471/500 is the answer
4 0
3 years ago
What is equivalent to ln(e^3)
malfutka [58]

Answer:

3

Step-by-step explanation:

The natural log is the inverse of the exponential (and vise versa), so ln(e^3) = 3.

(This is the also same as e^(ln3))

4 0
3 years ago
Read 2 more answers
Exercises
lyudmila [28]

Answer:

minimum 380 student tickets must be sold.

Step-by-step explanation:

c) 500x7=3500

intended  =5400

5400-3500=1900

1900/5= 380

3 0
2 years ago
2. Trapezoid WXYZ is located at W(2.1) X[3.
Nataliya [291]

Point Y is (6, -1)

Subtract 6 from the y coordinate in point y since it is translated down. keep the x coordinate since it is only being translated up and down, or by the y axis

5 0
3 years ago
Other questions:
  • Please help me brainliest for the best answer
    6·1 answer
  • Rob works for $8.00 per hour. His regular hours are 40 hours per week and he gets time-and-a-half for overtime. One week he work
    6·1 answer
  • two times Antonio's age plus three times Sarah's age equals 34. Sarah's age is also five times Antonio's age. how old is Sarah
    7·1 answer
  • Adionte writes this problem: 385 divided by 1800 Drag and drop all the expressions that show Adionte's problem into the box
    8·1 answer
  • The one about distibutive property?
    6·1 answer
  • Bob businessman offers credit at 20% interest per year. APR?%
    15·2 answers
  • The average person's stride lenghth the distance covered by one step is aproximently 2.5 feet long. How many steps would the ave
    14·1 answer
  • What is the result when you combine only the constants in the following expression? 3 a minus 6 b + 3 minus 7 a + 10
    10·2 answers
  • 3. Emilio is going to run 6 miles a day for 8 days. How many miles will he have completed
    6·1 answer
  • The number of murders and robberies per 100,000 population for a random selection of states is shown.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!