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GalinKa [24]
3 years ago
8

At a certain time of day, a ten-foot vertical pole casts a horizontal shadow that is six feet long, and a nearby tree casts an e

ighteen-foot shadow. how tall is the tree
Mathematics
1 answer:
Svetlanka [38]3 years ago
6 0
10 is to x as 6 is to 18 or
10/x=6/18
10/x=⅓
10=⅓x
3(10)=⅓x*3
30=x

the tree is 30 feet tall
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Tobi scored 145 on an iq test with a mean of 100 and a standard deviation of 15. what is her z score?
Andreas93 [3]

Z-score if Tobi scored 145 on an iq test with a mean of 100 and a standard deviation of 15 is 3.

According to the given question.

Tobi scored 145 marks on an iq test.

⇒ x = 145

Mean, μ = 100

Standard deviation, σ = 15

As we know that,

A Z-score is a numerical measurement that describes a value's relationship to the mean of a group of values.

And it is calculated by formula

Z = x -μ/σ

Where,

Z is a Z-score

μ is mean

x is the observed value

Therefore,

The Z-score if Tobi scored 145 on an iq test with a mean of 100 and a standard deviation of 15

= 145 - 100/15  

= 3

Hence,Z-score if Tobi scored 145 on an iq test with a mean of 100 and a standard deviation of 15 is 3.

Find out more information about Z-score here:

brainly.com/question/15016913

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