Suppose a laboratory has a 57 g sample of polonium-210. The half-life of polonium-210 is about 138 days. a. How many half-lives of polonium-210 occur in 276 days? b. How much polonium is in the sample 276 days later? A. 2; 14.25 g B. 2; 28.5 g C. 3; 7.13 g D. 2; 3,933 g

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Asked 6/7/2012 11:12:45 AM

Updated 4/26/2014 11:59:22 AM

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User: Suppose a laboratory has a 57 g sample of polonium-210. The half-life of polonium-210 is about 138 days. a. How many half-lives of polonium-210 occur in 276 days? b. How much polonium is in the sample 276 days later? A. 2; 14.25 g B. 2; 28.5 g C. 3; 7.13 g D. 2; 3,933 g

Weegy: A. 2; 14.25
Expert answered|rickjames|Points 761|

User: A boat costs $18,550 and decreases in value by 9% per year. How much will the boat be worth after 8 years? A. $8,723.18 B. $18,478.00 C. $7,938.10 D. $36,962.04

Weegy: A. $8,723.
Expert answered|rickjames|Points 761|

User: Simplify the expression. (a^-12 b^-8)/(a^-2 b^-11)

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Asked 6/7/2012 11:12:45 AM

Updated 4/26/2014 11:59:22 AM

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yeswey

(a^-12 b^-8)/(a^-2 b^-11)
= a^-10 b^3
= b^3/a^10

Added 4/26/2014 11:59:22 AM

This answer has been confirmed as correct and helpful.

Confirmed by jeifunk [4/26/2014 12:05:07 PM]

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Find the slope and y-intercept of the line. 18x + 2y = –36

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Updated 6/26/2014 4:15:28 PM

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andrewpallarca

18x + 2y = –36 in y = mx + b form is y = -9x - 18, where m stands for slope. Therefore, the slope is -9.
To find the y-intercept, let x = 0.
y = -9x - 18;
y = -9(0) - 18;
y = 0 - 18 = -18

Slope: -9
Y-intercept: -18

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Updated 7/31/2023 12:39:39 AM

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KuyaBert_09

No, since the slopes are different.

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