4 years ago

The binomial a squared minus b squared is called a

1 answer:

6 0

Difference of two squares.
a^2 - b^2 = (a+b)(a-b)
remember this as you will incur it a lot in all of algebra up through calculus.....

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Hitman42 [59]

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3 years ago

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4 years ago

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marta [7]

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3 years ago

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3 years ago

Actual lengths of pregnancy terms for a particular species of mammal are nearly normally distributed about a mean pregnancy leng

HACTEHA [7]

Solution :

The data is normally distributed.

The standard deviation is 18 days

Here the data is normally distributed and 54 days is 3 days of standard deviation.

Therefore, the percentage of the births that would be $\text{expected to occur}$ within the 54 days of the mean $\text{pregnancy}$ length is given by :

= P( -3 < Z < 3)

= 0.9544

= 95 %

Therefore, about 95% of the births would be $\text{expected to occur}$ within 54 days of the men $\text{pregnancy}$ length.

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3 years ago