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Readme [11.4K]
3 years ago
13

Many smoke detectors contain:

Mathematics
1 answer:
Yanka [14]3 years ago
3 0

Answer:

Option B, Americium-241, is the right answer.

Step-by-step explanation:

  • A device which senses smoke usually as an indicator of fire is known as a smoke detector.
  • The two most common types of smoke detectors are the Ionization chamber and photoelectric smoke indicators.
  • Many of these smoke detectors comprise some amount of americium-241, which is a radioactive substance.
  • These smoke detectors respond immediately to fires that give off some smoke.
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The measure of an angle is 78°. What is the measure of a complementary angle?
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First you need to know the definition of a complementary angle. That means that two angles add up to 90 degrees, or a right angle.

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The greater of two consecutive EVEN numbers is 40 less than twice the smaller number. Find the larger number
Bas_tet [7]

Answer:

<h3>           44</h3>

Step-by-step explanation:

z -  some integer

2z - first given even integer (the smaller one)

2z+2 - even integer consecutive to 2z  (the larger one)

2(2z)    - twice the smaller number

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2(2z) - 40 = 2z + 2

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check:

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3 0
3 years ago
A bag contains 12 discs
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Answer:

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Yellow, 1/66

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3/12 times 2/11

2/12 times 1/11

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