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
Anit [1.1K]
3 years ago
6

If there are 360 g of radioactive material with a half life (decreased by half or 50% )of 1 hour, how much of the radioactive ma

terial will be left after 4 hours ?
Mathematics
1 answer:
Lostsunrise [7]3 years ago
5 0

After 1 hour, 360 g decays to 180 g.

After another hour (total 2 hours), 180 g decays to 90 g.

After another hour (total 3), 90 g decays to 45 g.

After one more (total 4), 45 g decays to 22.5 g.

More quickly, with a half-life of 1 hour, the 360 g of starting material decays to

(360 g) / 2⁴ = 22.5 g

In general, if the half-life is 1 hour, then after <em>n</em> hours, an initial amount <em>A</em> of this substance decays according to

<em>A</em> / 2<em>ⁿ</em>

You might be interested in
You are considering the purchase of a closed circuit TV monitoring system for your store. The quarterly physical inventory has s
Tcecarenko [31]
If quarterly shrinkage (every 3 months) is 2.5%, then multiplying by $875,495 gives a value of 21887.38, or an average monthly shrinkage of 21887.38 / 3 = $7,295.79.For an employee to monitor the CCTV, it would cost ($7.5/h)(11 h/d)(30 d/m) = $2,475/month. Therefore, it is much cheaper (around 2/3 cheaper) to have an employee monitor CCTV rather than to allow the high shrinkage rate.

7 0
3 years ago
How do you multiply polynomials ??
jeka94

Answer:

multiply each term in one polynomial by each term in the other polynomial.

add those answers together, and simplify if needed.

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
What is the greatest common factor of 45,105,75?
Murljashka [212]

Answer:

The GCF is 15.

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
What is the 30th term of the linear sequence below<br><br><br> -4, -1, 1, 2, 5, 8, ....
likoan [24]

Answer:

83

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Write the rule for finding the coordinates of a point that has undergone a dilation (with the origin as the point of dilation).
Evgesh-ka [11]

Answer:

(12, 40)

Step-by-step explanation:

The first thing is to assume that we have a point with the following coordinates (x, y).

Now, we can have two different cases since the meaning of the expansion of a point is moving to a new point that is a greater distance from the origin if we are expanding by a value, that is, an integer in the system of coordinates and the other case is that if we are dilating by a fraction that is between 0 <x <1, then the distance from the origin decreases.

Now, the point (x, y) goes through an expansion by a scale factor f (with the origin as the expansion point), then the new coordinate of the point = [f * x, f * y], that scale factor has the value of 3, so if we replace we have:

(3 * 4, 4 * 10) = (12, 40)

3 0
2 years ago
Other questions:
  • Use the reverse tabular method to solve division problem: (x^4+2x^3+2x^2+2x+1)/(x+1)
    13·1 answer
  • Which statement is NOT true? A. All isosceles triangles are also equilateral triangles. B. All equilateral triangles are also is
    6·1 answer
  • you buy 2 t shirts in a sale you pay the full price 12 for the t shirt and get the second onehalf off what fraction do you pay f
    11·2 answers
  • 4 more than some number, n
    10·1 answer
  • The area of a trapezoid is 36 in.² the height is 4 inches and one bases twice the length of the other place what are the lengths
    6·1 answer
  • X = y - 3
    9·1 answer
  • Can a unit rate be a fraction
    6·2 answers
  • B) i) Solve - 4(3+x) + 5x + 3
    13·1 answer
  • 50 is ____________ times as large as 5.
    10·2 answers
  • What is the sun's approximate azimuth when it sets? PLEASE ANSWER I GIVE BRAINLIEST AND 20 POINTS PLEEEEEAAAAAASSSSSEEEEE!!
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!