3 years ago

The table shows the cost of downloading songs.

Mathematics

1 answer:

Sonbull [250]3 years ago

3 0

Answer:

Step-by-step explanation:

rate of change=cost per song

so the first option

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If A and B are independent events with P(A) = .5 and P(B) = .2, find the following:a) P(A U B)b) P(A^c ? B^c)c) P(A^c U B^c)**No

Effectus [21]

If A and B are independent, then $P(A\cap B)=P(A)P(B)$ .

$P(A\cup B)=P(A)+P(B)-P(A\cap B)=P(A)+P(B)-P(A)P(B)$

$P(A\cup B)=0.5+0.2-0.5\cdot0.2$

$\boxed{P(A\cup B)=0.6}$

b. I'm guessing the ? is supposed to stand for intersection. We can use DeMorgan's law for complements here:

$P(A^c\cap B^c)=P(A\cup B)^c=1-P(A\cup B)$

$P(A^c\cap B^c)=1-0.6$

$\boxed{P(A^c\cap B^c)=0.4}$

c. DeMorgan's law can be used here too:

$P(A^c\cup B^c)=P(A\cap B)^c=1-P(A\cap B)=1-P(A)P(B)$

$P(A^c\cup B^c)=1-0.5\cdot0.2$

$\boxed{P(A^c\cup B^c)=0.9}$

4 0

2 years ago

Help

Natali5045456 [20]

Answer:

$1.9 \sqrt{3}$

Step-by-step explanation:

3.8 is 2x 3.8/2 is 1.9

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2 years ago

Ricky withdrew a total of $175 from his bank account over 5 days. He withdrew the same amount each day. By how much did the amou

kifflom [539]

Answer:

$35

Step-by-step explanation:

175/5 = 35

have a nice day! (maybe get this double checked in case I did it wrong :D)

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2 years ago

F(x)=x^2 -5x+1<br><br><br> f(x+h)-f(x)/h =

Sergeu [11.5K]

The answer is

F = x - 5 + 1/5

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2 years ago

Determining the Scale Factor of a Dilation Consider the dilation of pentagon ABCDE by a scale factor of If AB = 12, then A'B' A&

barxatty [35]

<h3>Answer:</h3>

<u>If AB = 12units, then</u>

A'B' = 1/2 × 12 = 6units.

<u>If C'D' = 5units, then</u>

CD = 2 × 5 = 10units.

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2 years ago