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3 years ago

A. B. C. D. This is urgent!!!

Mathematics

1 answer:

Gala2k [10]3 years ago

6 0

Answer:

1/8

Step-by-step explanation:

( 2^-1 / 2^0) ^3

First simplify inside the parentheses

We know that a^b / a^c = a^(b-c)

2^(-1-0) = 2^-1

( 2^-1 ) ^3

Then we know that a power to a power is

a^b^c = a^(b*c)

2^(-1 *3)

2^ -3

Then a negative exponent makes it a fraction

a^ -b = 1/a^b

1 /2^3

1/8

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3 years ago

In the town of Maplewood a certain type of DVD player is sold at just two stores, 43% of the sales 13) are from store A and 57%

umka21 [38]

Answer:

Option A 0.312 is right

Step-by-step explanation:

Given that iN Maplewood a certain type of DVD player is sold at just two stores, 43% of the sales 13) are from store A and 57% of the sales are from store B. 2.4% of the DVD players sold at store A are defective while 4.0% of the DVD players sold at store B are defective.

Prob for any random item form store to be defective = Prob from A and defective +Prob from B and defective

= $0.43(0.024)+0.57(0.04)\\=0.03312$

Prob it came from A and defective = 0. $0.43(0.024)=0.01032$

If Kate receives one of these DVD players as a gift and finds that it is defective, what is the probability that it came from store A

= $\frac{0.01032}{0.03312} \\=0.312$

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3 years ago

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