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3 years ago

Let a be an irrational number. Is 1/a rational or irrational

2 answers:

8 0

An irrational number multiplied, divided, added, or subtracted with a rational number, (or the other way around) is always irrational.

Since a is irrational, 1/a is 1/ a rational number, which will be irrational.

Marianna [84]3 years ago

7 0

<u>1 is a rational number</u> because 1 can go into 1 when dividing. <u>Irrational numbers are mostly decimals. </u>

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3 years ago

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aksik [14]

Answer:

Proportion of the trees will have diameters between 2 and 6 inches = 0.8164

Step-by-step explanation:

Given -

Mean $(\nu )$ = 4

Standard deviation $(\sigma )$ = 1.5

Let X be the diameter of tree

proportion of the trees will have diameters between 2 and 6 inches =

$P(2< X< 6)$ = $P(\frac{2 - 4 }{1.5}< \frac{X - \nu }{\sigma}< \frac{6 - 4 }{1.5})$

= $P(\frac{-2 }{1.5}< Z< \frac{2 }{1.5})$ Put [ $Z = \frac{X - \nu }{\sigma}$ ]

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= $(Z< 1.33) - (Z< -1.33)$

= .9082 - .0918

= 0.8164

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3 years ago

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3 years ago

Sadie types 800 words in 16 minutes. What is the unit rate in words per minute?

anyanavicka [17]

Answer:

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2 years ago

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Oksana_A [137]

Answer:

y=0 when x=-1

Step-by-step explanation:

We look at the chart to see that there is a value for y when x equals negative 1.

According to the chart, y equals 0 when x=-1.

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