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2 years ago

There are 600 counters in a bag 90 of them are yellow.

Mathematics

2 answers:

klio [65]2 years ago

8 0

3 over 20 is the fraction in simplest form.

katrin [286]2 years ago

7 0

90 of the 600 are yellow
that is
90/600 are yellow
greatest common factor is 30
so 90/30 = 3
and 600 /30 = 20
so the fraction simplified is
3/20 counters are yellow

Hope this helps :)

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3 years ago

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The length of the radius is 2.95 units 

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2 years ago

The length of overline CD is 12 units. C^ prime D^ prime is the image of overline CD under a dilation with a scale factor of n.

Rufina [12.5K]

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A, D , and E

Step-by-step explanation:

We have that:

$\overline{CD} = 12 \: units$

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Option C

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This too is false.

Option D

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3 years ago

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Answer:

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Step-by-step explanation:

We are given that a half-century ago, the mean height of women in a particular country in their 20's was 64.7 inches. Assume that the heights of today's women in their 20's are approximately normally distributed with a standard deviation of 2.07 inches.

Also, a samples of 21 of today's women in their 20's have been taken.

Let $\bar X$ = sample mean heights

The z-score probability distribution for sample mean is given by;

Z = $\frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n} } }$ ~ N(0,1)

where, $\mu$ = population mean height of women = 64.7 inches

$\sigma$ = standard deviation = 2.07 inches

The Z-score measures how many standard deviations the measure is away from the mean. After finding the Z-score, we look at the z-score table and find the p-value (area) associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X.

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Therefore, 99.5% of all samples of 21 of today's women in their 20's have mean heights of at least 65.86 inches.

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