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4 years ago

What is 4/11 divided by 4/9 as a fraction

Mathematics

1 answer:

vovikov84 [41]4 years ago

5 0

Answer:

9/11

Step-by-step explanation:

To divide, you have to flip the dividend.

So, 4/9 would become 9/4

Then you multiply 4/11 by 9/4

This would give you 36/44

Simplify.

18/22

Simplify some more.

9/11

Hope I helped :)

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If,

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But 3^x ≠ 21875,if x is a whole number.

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Evaluate the expression for n=-4<br> n-1

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3 years ago

Write the equation of a line:

valkas [14]

Answer:

y = -½x + 4

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3 years ago

The completion time for an exam is normally distributed with expected value 75 minutes and variance 12 minutes. What is the prob

Debora [2.8K]

Answer:

14.89% or 0.1489

Step-by-step explanation:

First, find the z-score for both 70 and 80 minutes and their corresponding percentile.

$z= \frac{X - \mu }{SD} \\SD=\sqrt{V} =\sqrt{12}\\\mu =75\\z= \frac{X - 75}{\sqrt{12}}\\\\$

For X = 70 minutes:

$z= \frac{70 - 75}{\sqrt{12}}\\z=-1.4434$

This z-score is equivalent to the 7.445 th percentile, so the probability of a student finishing this exam in less than 70 minutes is 7.445%

or X = 80 minutes:

$z= \frac{80 - 75}{\sqrt{12}}\\z=1.4434$

This z-score is equivalent to the 92.555 th percentile, so the probability of a student finishing this exam in more than 80 minutes is 100- 92.555 = 7.445%

Therefore, the probability (P) of a student finishing this exam in less than 70 minutes or more than 80 minutes is:

P = 7.445% + 7.445% = 14.89%

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3 years ago