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
Alborosie
3 years ago
10

If 800g of a radioactive substance are present initially and 8 years later only 450g remain, how much of the substance will be p

resent after 16 years? (Round answer to a whole number)
Mathematics
1 answer:
artcher [175]3 years ago
5 0

A=Pe^(rt)

P = 800g

t = 8 years

A = 450g

r = This is what we will try and find to start with

450=800e^(r*8)

After running the math through a calculator, we end with r = -0.07192

Now we just re-input this information into our equation: A=800e^(-0.07192*16)

A=800e^(1.15072)

Now we will re-write the equation using the negative exponent rule:

A = 800 1/e^1.15072

Combine right side:

A = 800/e^1.15072

Then do the math:

A = 253.12709836......

That will give us A = 253 (rounded to the whole number)

I hope this helps! :)

You might be interested in
Which is the correct answer? A , B , C , or D?
NeX [460]

Answer:

A

Step-by-step explanation:

f(x) - g(x)

= x² - 8 - (4 - x) ← distribute parenthesis by - 1

= x² - 8 - 4 + x ← collect like terms

= x² + x - 12 → A

4 0
3 years ago
Let f(x) be an exponential functionWhich transformations to the graph of f(x) would describe e - f(x - 3) ?
gayaneshka [121]

Look at the graph below carefully

Observe the results of shifting ={2}^{x}f(x)=2​x

​​  vertically:

The domain, (−∞,∞) remains unchanged.

When the function is shifted up 3 units to ={2}^{x}+3g(x)=2​x +3:

The y-intercept shifts up 3 units to (0,4).

The asymptote shifts up 3 units to y=3y=3.

The range becomes (3,∞).

When the function is shifted down 3 units to ={2}^{x}-3h(x)=2 ​x​​ −3:

The y-intercept shifts down 3 units to (0,−2).

The asymptote also shifts down 3 units to y=-3y=−3.

The range becomes (−3,∞).

3 0
3 years ago
Read 2 more answers
Is 582 an even number
Kisachek [45]

Answer:

Yes

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Recall what you know about similarity. If circle B is similar to circle A, what must exist?
Arlecino [84]

Answer:

circle a and circle b must exist

Step-by-step explanation:is circle a and circle b did not exist this question would not be one

7 0
3 years ago
3. The sum of two numbers is 17. The difference between the larger number and the
Leno4ka [110]

Answer:

5

Step-by-step explanation:

To solve this problem, we need to set up a system of equations. Let x represent the larger number and y represent the smaller number.

x + y = 17

x - y = 7

We can solve this system by adding them together. The y cancels out because y + (-y) = 0. After that, we solve for x

2x = 24          

x = 12              (Divide both sides by 2)

Now that we know the value of x, we can substitute it into one of our original equations to solve for y.

12 + y = 17      

y = 5                (Subtract 12 from both sides)

So, the smaller number is 5.

4 0
3 years ago
Other questions:
  • Express 0.009238 to 3 significant figures​
    5·1 answer
  • How do you divide a fraction
    14·2 answers
  • The triangles shown below must be congruent.<br><br> A. True<br> B. False
    12·2 answers
  • Rewrite 8^-12 isIng a positive exponent
    15·2 answers
  • An equation that models the sequence 400, 200, 100, 50, ...
    11·1 answer
  • F(x) = 2x<br> g(x) = 2x + 1<br> Find<br> (f/g) (x) . Include ahy restrictions on the domain.
    8·1 answer
  • Solve for me pleasee​
    10·2 answers
  • Which is the same as 3 feet?
    15·2 answers
  • Which statement can help build a person’s self-esteem? A. I am really proud of you B. You really disappointed me with your prese
    11·2 answers
  • Given a1 = 8 and r = 2, identify the 23rd term
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!