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
Zina [86]
2 years ago
13

Use the fact that the quantity of a radioactive substance after t years is given by

Mathematics
1 answer:
AURORKA [14]2 years ago
6 0

Answer:

  50 kg

Step-by-step explanation:

Put the given numbers into the given formula and do the arithmetic.

  q = q0(2^(-t/k))

  q = (87 kg)(2^(-20/25)) = (87 kg)(0.574349)

  q ≈ 50 kg

The amount remaining after 20 years is about 50 kg.

You might be interested in
Help me with this as well i am struggling
Ilya [14]

Answer:

3

Step-by-step explanation:

see image

8 0
2 years ago
What is the total surface area of the prism?
Trava [24]
The total surface area of this prism is 480.
7 0
3 years ago
Read 2 more answers
What happens to the circumference of a circle when the radius is quadrupled?
kogti [31]
He circumference of a circle<span> is equal to the diameter times pi. So, let's look at </span>what happens<span> if you double the </span>radius<span> of a </span>circle<span> -- say from 2 to 4. The area will go from 12.56 to 50.24. This means that it has </span>quadrupled<span>.</span>
6 0
3 years ago
Read 2 more answers
A bread recipe calls for 1 teaspoon of yeast for every 2
Georgia [21]
I believe it is (5,10)
7 0
2 years ago
4,890 + 7,801 what is the anwser
Crank
12691 <<< is the answer
5 0
3 years ago
Read 2 more answers
Other questions:
  • Sandy's orchard has only 4 apple trees for every 3 pear trees. She is wanting to plant enough avocado trees so that she has 2 av
    12·1 answer
  • How do i turn a decimal into a fraction
    12·2 answers
  • Translate the sentence into an inequality. Twice the difference of a number and 4 is at most -21. Use the variable x for the unk
    9·1 answer
  • Use any method to solve the equation. If necessary, round to the nearest hundredth. 9x^2-21=0
    7·1 answer
  • Evaluate the expression when a = –1.4 and b = –2.7.     |a| + b
    8·2 answers
  • What is the value of n in the equation 1/2(n-4)-3=3-(2n+3)
    15·2 answers
  • Express 33 1/2% as fraction<br><br>​
    6·1 answer
  • kenneth has a job that pays $11 per hour after taxes are taken out. He’s trying to save enough money to buy a video game that co
    11·1 answer
  • HELP I NEED HELP ASAP
    15·2 answers
  • PLS HELP ME ON THIS ASAP
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!