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3 years ago

Picture attached please help

Mathematics

1 answer:

bogdanovich [222]3 years ago

5 0

Answer:

Step-by-step explanation:

red blood cell = 0.000009 = 9 × $10^{-5}$

cold virus = 0.0000003 = 3 × $10^{-7}$

Divide diameter of red blood cell by diameter of cold virus

$\frac{9(10^-5)}{3(10^-7 )}$

= 3 × $10^{-5-(-7)}$

= 3 $10^{-5+7}$

= 3 × 10² → D

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Fantom [35]

Answer:

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Step-by-step explanation:

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3 years ago

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marin [14]

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4 years ago

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You flip a coin that is not fair, the prbability of heads on each flip is 0.7. if the coin shows heads, you draw a marble from u

Shkiper50 [21]

Solution :

P(H) = 0.7 ; P(T) = 0.3

If heads, then Urn H, 1 blue and 4 red marbles.

If tails, then Urn T , 3 blue and 1 red marbles.

a).

P ( choosing a Red marble )

= P (H) x P( Red from Urn H) + P (T) x P( Red from Urn T)

$=0.7 \times \frac{4}{5} + 0.3 \times \frac{1}{4}$

= 0.56 + 0.075

= 0.635

b). If P (B, if coin showed heads)

If heads, then marble is picked from Urn H.

Therefore,

P (Blue) $=\frac{1}{5}$

= 0.2

c). P (Tails, if marble was red)

$=P (T/R) = \frac{P(R/T)}{P(R)} \ P(T)$

Where P (R/T) = P ( red, if coin showed tails)

$=\frac{1}{4}$

= 0.25 (As Urn T is chosen)

P (R) = P (Red) = 0.635 (from part (a) )

P (T) = P (Tails) = 0.3

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3 years ago

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rjkz [21]

Answer:

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Step-by-step explanation:

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3 years ago