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
Stells [14]
3 years ago
13

after 24.0 days, 2.00 milligrams of an original 128.0 milligram sample remain. what is the half-life of the sample?

Mathematics
1 answer:
coldgirl [10]3 years ago
6 0
<span>(1/2)n = 0.015625 
n log 0.5 = log 0.015625 
n = log 0.5 / log 0.015625 
n = 6</span><span>24 days / 6 half-lives = 4.00 days (the length of the half-life)

</span>
You might be interested in
In a right triangle the lengths of the legs are a and b. Find the length of the hypotenuse, if: a=3/7, b=4/7
dexar [7]

Answer:

5/7

Step-by-step explanation:

We need the Pythagorean Theorem here.

If you have a right triangle, you can use the equation a^2+b^2=c^2 where a and b are legs and c is the hypotenuse.

Plug in your information.

(3/7)^2+(4/7)^2=c^2

Simplify what you can.

9/49+16/49=c^2

25/49=c^2

Square root both sides.

5/7=c

3 0
3 years ago
Read 2 more answers
Consider the angles in the star, shown below. A pair of vertical angles are ___________.
Gwar [14]

A pair of vertical angles are B and D, because they are vertical, or across from, each other.

Hope this helps! :)

6 0
4 years ago
Please help....thank you
kupik [55]

Answer:

6j-11j-11j+19=-13

-16j+19=-13

-16j=-32

16j=32

j=2

Omg i hate ixl you have my sypathy

Hope This Helps!!!

6 0
3 years ago
Read 2 more answers
9×7= Use. the disistributive property to find each product.<br><br>​
ANEK [815]

Answer:

63

Step-by-step explanation:

first yoy need to put the biggest number on the top then multiply each number

6 0
3 years ago
What is 9.24 divided by 15.4
worty [1.4K]
The answer is 0.6.

9.24÷15.4=0.6
7 0
4 years ago
Other questions:
  • In ΔABC, a = 8 and b = 8. If the area of ΔABC is 16, then m∠C may be equal to (1)30 (2)40 (3)50 (4)60?
    9·1 answer
  • Please answer soon! I will mark brainiest!
    14·1 answer
  • There are 45 new houses being built in a neighborhood. Last month 1/3 of them were sold. This month 2/5 of the remaining houses
    10·1 answer
  • Help me pleaseeeeeeeee
    15·2 answers
  • If there are 1/18 cups of brown sugar per serving, how much brown sugar will you need for 9 servings ?
    14·2 answers
  • which answer choice shows both the equation that represents the sentence and the correct solution to that equation?
    14·1 answer
  • How many 1/4 are there in 3/8
    5·2 answers
  • Plot the ordered pair (4,-2) State in which quadrant or on which axis the point lies
    10·2 answers
  • On Monday, 217 students went on a trip to the zoo. All 4 buses were filled and 9 students had to travel in cars. How many studen
    11·1 answer
  • -13.9+(-12.8) evaluate the answer
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!