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Vedmedyk [2.9K]
3 years ago
8

A sample contains 400 Plutonium-244 atoms. After 1 half-life(s) how many plutonium atoms are left on average?

Mathematics
1 answer:
SpyIntel [72]3 years ago
8 0

Answer:

200

Step-by-step explanation:

Divide 400 by 1/2 or 2.

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Counting the number of times a third-grade student leaves his seat without permission during a 30-minute observation period is a
notka56 [123]

Answer:

Behavioral modality of measurement

Step-by-step explanation:

Observing a 3rd grade student for 30 minutes as to how many time he leaves his seat without permission is a clear example of using behavioral modality of measurement.

In this modality of measurement the behavior of the object or system is observed when it is put into action.

This example shows as to what will happen or what is supposed to take place when a 3rd grade student is is seated and observed for 30 minutes. It counts as to how many times he leaves his seat in reaction to his stimulus from the environment.

6 0
4 years ago
An arithmetic sequence is defined by the recursive formula t1 = 9, tn = tn - 1 - 4, where n ∈N and n > 1. The sequence is
VikaD [51]
T2 = t1 - 4 = 9 - 4 = 5
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4 0
3 years ago
Please help me with the following questions. Thanks!
Natali5045456 [20]

Answer:

The answer to your questions  are in bold

Step-by-step explanation:

a)  

 C = \left[\begin{array}{ccc}-6&6\\-2&4\\\end{array}\right]

    = -24 + 12

   = -12

b)  -1   7          -4   -1                   -1  - 4        7 - 1               - 5      6

    -2 -6          -8    8      =          -2 - 8       -6 + 8              -10      2

     2 -3           2   -7                  2 + 2        -3 - 7               4       -10

   -1   10         -6     5                 -1 - 6         10 + 5              -7       15

5 0
3 years ago
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Daniel [21]
Y = 3/2x + b
4 = 3/2(-10) + b
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Y = 3/2x + 19
5 0
3 years ago
What is 1/6 times 1/6
Murljashka [212]
1/6* 1/6. Multiply the top number and the bottom numbers and you have 1/36.
5 0
3 years ago
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