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
The difference between the prediction interval and the confidence interval is that A. the prediction interval is narrower than t
Kitty [74]

Answer:

<em>The prediction interval provides an interval estimation for a particular value of y while the confidence interval does it for the expected value of y. </em>

Step-by-step explanation:

<em>A</em><em>. the prediction interval is narrower than the confidence interval.</em>

the prediction interval is always wider than the confidence interval.

<em>B</em><em>. the prediction interval provides an interval estimation for the expected value of y while the confidence interval does it for a particular value of y.</em>

False

<em>C</em><em>. the prediction interval provides an interval estimation for a particular value of y while the confidence interval does it for the expected value of y. </em>

<em>True</em>

<em>D.</em><em> the confidence interval is wider than the prediction interval.</em>

the prediction interval is  wider

8 0
3 years ago
Chapters: 1.Integers
SCORPION-xisa [38]

Answer:

a) -12

b) -4

c)-2

Step-by-step explanation:

a) pattern is minus 5

b) pattern is minus 8

c) pattern is plus 4

4 0
3 years ago
Our answer should be a complex number in the form a +bi where a and b are real numbers.
Otrada [13]

Answer:

16 +88i

Step-by-step explanation:

8 x (11i + 2 ) =

Distribute

8*11i + 8*2

88i +16

Writing in the proper form

16 +88i

6 0
3 years ago
As shown in the figure , a metal cube of side 6 cm is melted and recast into a triangular prism . Find the height of the triangu
vivado [14]

Answer:

I believe it is 6.

Step-by-step explanation:

3 0
3 years ago
Each day about 75, 0 0 0 people visit Paris in France use a commutative property to write the two equivalent expressions that co
Alenkasestr [34]
75,000 x 5 = 5 x 75,000

just multiply 75,000 by five, since there are 75,000 people who visit oer day, and the teacher is looking for people to visit in a five day period. Then just change the order, and voila! 

Mark as Brainliest ^_^
7 0
3 years ago
Other questions:
  • Melanie drew a line l and a point P that was not on l . Which of these is an impossible value for the number of line segments th
    6·2 answers
  • Write the equation in standard form for the cricle with center (-2,4) and radius 9
    11·1 answer
  • Find dy/dx for y=log (tan2x)
    7·1 answer
  • Please help I don't understand :(
    5·2 answers
  • Consider 6x2 + 6x + 1. Which term immediately tells you that this expression is NOT a perfect square trinomial? Justify your ans
    15·2 answers
  • Use the product property of exponents to justify that (9^1/2)^2=9
    10·1 answer
  • I will mark you brainlist!
    13·1 answer
  • Write a multiplication equation to represent each division equation 50 divided by 10 equals 5
    13·1 answer
  • The perimeter of a square is 67 cm. What is the length of its
    13·2 answers
  • A reaction takes 4 min 28 sec to complete. Which of the following is a correct representation of that time period?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!