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morpeh [17]
3 years ago
7

Plutonium-240 decays according to the function e(t)=Q e-k where 0 represents the quantity remaining after t years and k is the d

ecay constant, 0.00011... To the nearest 10 years, how long will it take 27 grams of plutonium-240 to decay to 9 grams? A. 1.44 years B. 2,100 years C. 9,990 years D. 18,900 years​
Mathematics
1 answer:
Grace [21]3 years ago
7 0

Answer: 9,990

Step-by-step explanation:

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Answer:

30°  is one of the degree measures of the angles.

Hence, option (A) is true.

Step-by-step explanation:

  • Let 'x' be the degree measure of the first angle.

Given that the degree measure of one of two complementary angles is twice that of the other.

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<em><u>Complementary angles</u></em>

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Thus the equation becomes

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Step-by-step:

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