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
andreev551 [17]
2 years ago
15

Sodium-24 has a half-life of 15 hours. When will 4 mg of Sodium-24 remain if the original sample contains 64 mg?

Mathematics
1 answer:
Katen [24]2 years ago
6 0

Answer:

60 hours

Step-by-step explanation:

We are given;

Initial amount: A_o = 64 mg

Half life; T_½ = 15 hours

Amount left: A = 4 mg

To get the time that 4 mg of Sodium-24 remain, we will use the formula;

A = A_o(½^(t/T_½))

Where t is the time that 4 mg of Sodium-24 remain.

Thus;

4 = 64 × ½^(t/15)

Divide both sides by 64 to get;

4/64 = 2^(t/15)

0.0625 = ½^(t/15)

In 0.0625 = (t/15) In 0.5

-2.7726 = (t/15) × -0.6931

t = (-2.7726 × 15)/-0.6931

t = 60 hours

You might be interested in
All tickets for a local country concert are the same price. The ticket agency adds a fixed fee to every order. A person who orde
Norma-Jean [14]

Answer:

Since we are doing division the correct answer would be :

18


108 divided by 6 = 18


Hope this helps! :)

5 0
3 years ago
Find the slope-intercept equation of the line containing (1.-4) and having slope m = 3​
gulaghasi [49]

Answer:

y=3x-7

Step-by-step explanation:

7 0
3 years ago
The table shows the low outside temperatures for Monday, Tuesday, and Wednesday.
Sever21 [200]
-8.8 - (16.5) =
-8.8 + 16.5 =
7.7 <==
4 0
3 years ago
Describe the key features of polynomial function
Oksi-84 [34.3K]

Answer:

Zeros: x = 1 , − 2 , 2 End Behavior: Falls to the left and rises to the right.

Y-intercept: (0,4)

Step-by-step explanation:

mark me brainliest

3 0
3 years ago
SAT Math Question
mariarad [96]

I'm tentatively changing my answer to say this kind of relies on practical knowledge of how stores tend to operate. If 20 coupons are given out, the store has sold all 500 shirts, arguably at a loss to the retailer. They have to have more shirts in stock to be sold at full price because, well, that's how they make money. It's more likely that such a store would carry more than just 500 shirts at the start of each day, so A is (probably) wrong.

5 0
1 year ago
Other questions:
  • If the function graphed is f(x), find f(1)
    13·1 answer
  • What is the value of x
    6·2 answers
  • 3. The manager of a fish store has water that is 10% salt and water that is 25% salt. He needs to fill an aquarium with 5 gallon
    6·1 answer
  • Minxia counted 40 green cars and 20 silver cars inn the parking lot if the number of green cars stays the same how many more sil
    11·1 answer
  • Which of the following is the solution to |-2x-15|≤7
    8·1 answer
  • Hey can you please help me posted picture of question :)
    5·2 answers
  • If 6 teenagers can drink 6 ice cream sodas in 2 minutes. how many ice cream sodas can the same 6 teenagers drink in 2 hours
    6·2 answers
  • Determine if the table below represents a linear function. If so, what's the rate of change?
    5·2 answers
  • 2 1/4 - 1/15
    9·2 answers
  • 9. A triangle has an area of 36 yd2 and a base of 3 yd, what is the height of the triangle?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!