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Bezzdna [24]
3 years ago
8

A bag contains 15 marbles. The probability of randomly selecting a green marble is . The probability of randomly selecting a gre

en marble, replacing it, and then randomly selecting a blue marble is . How many blue marbles are in the bag?
Mathematics
2 answers:
Mrac [35]3 years ago
8 0

Answer:

so there is 1/5 out of 15  green marbles so that makes 3 and there was 2/25 Chance of getting a blue so replacing the green so i assume its 6 marbles now

Stella [2.4K]3 years ago
6 0

Answer:

Answer is unknown because we do not know how many green marbles there are or how many blue there are. We also do not have information on if there is any other colors in the bag. Answer could probably be found if the probability of randomly selecting a green marble was.

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Sergeeva-Olga [200]

1.55

3/4 and 16/20 equivalent = 3/4 + 16/20 = (?)

\boxed{3/4+16/20=1.55}

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2 years ago
WILL mark brainliest!
Angelina_Jolie [31]

Answer:

  110.5348 minutes

Step-by-step explanation:

The difference from room temperature changes from 103 to 59 in 46 minutes, so that difference can be modeled by the exponential equation ...

  Δt = 103×(59/103)^(t/46)

We want to find t for the temperature difference Δt = 91 -64 = 27.

  27 = 103×(59/103)^(t/46)

  27/103 = (59/103)^(t/46) . . . . . divide by 103

Taking logs gives the linear equation ...

  log(27/103) = (t/46)log(59/103)

Multiplying by the inverse of the coefficient of t, we get ...

  t = 46·log(27/103)/log(59/103) ≈ 46·(-0.58147346)/(-0.24198521)

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It will take about 110.5347 minutes for the turkey to cool to 91 °F internally.

_____

<em>Comment on 4 decimal places</em>

An answer correct to 4 decimal places (7 significant digits) is a pretty good indication that the problem was worked correctly. However, that level of precision in the timing makes little sense in this context. Most thermometers will take at least a few seconds to register the temperature to within a tenth of a degree or so. This problem is asking for an answer that is within 6 milliseconds and 30 micro-degrees. Neither of these is anywhere near realistic for a kitchen meat thermometer.

More realistic would be an answer to 4 <em>significant figures</em>, a tenth of a minute and a few hundredths of a degree.

(The rate of change at the time of interest is about -0.33 degrees per minute.)

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Answer:

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Answer:

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