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ki77a [65]
3 years ago
5

Find the solution sets for 4

Mathematics
1 answer:
Ket [755]3 years ago
5 0

Answer:

??????????????????? 3+1

Step-by-step explanation:

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A certain radioactive isotope decays at a rate of 2% per 100 years. if t represents time in years and y represents the amount of
gregori [183]
We rewrite the equation:
 y = y0 * e ^ (- 0.0002 * t)
 In this equation:
 I = represents the initial amount of the isotope
 We have then:
 89% of the isotope left:
 0.89 * y0 = y0 * e ^ (- 0.0002 * t)
 We clear the time:
 e ^ (- 0.0002 * t) = 0.89
 Ln (e ^ (- 0.0002 * t)) = Ln (0.89)
 -0.0002 * t = Ln (0.89)
 t = Ln (0.89) / (- 0.0002)
 t = 582.6690813
 round to the nearest year:
 t = 583 years
 Answer:
 
There will be 89% of the isotope left in about:
 
t = 583 years
7 0
3 years ago
Help please!! if it’s correct ill mark you as brainliest
Levart [38]

Answer:

\frac{2\pi }{25}

(8^2 x pi)/ (20x40)

6 0
2 years ago
Multiply. express your anwser in simplist form.. 1 7\8 × 2 1\3​
Vera_Pavlovna [14]

Answer:

If not simplified 35/8 if simplified 4 and 3/8.

Have a fantastic day :)

3 0
2 years ago
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I think the answer to this question is 18
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If rs=st the point s is called the midpoint of rt?
SIZIF [17.4K]
S is the midpoint of RT
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