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Helen [10]
3 years ago
9

At age six, Kylie is 50 inches tall. Her height has a z-score of 1.8. At age four, Hannah is 48 inches tall. Her height has a z-

score of 2.1. Relative to girls their ages, who is taller? Kylie is taller because her z-score is lower than Hannah’s z-score. Hannah is taller because her z-score is higher than Kylie’s z-score. Kylie is taller because her z-score is closer to the mean than Hannah’s z-score. Hannah is taller because her z-score is closer to the mean than Kylie’s z-score.
Mathematics
1 answer:
xxMikexx [17]3 years ago
5 0

Answer:

Hannah is taller because her z-score is higher than Kylie’s z-score.

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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I hope this helps and please don't hesitate to ask if there is anything still unclear!

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If the length of the minute hand of the clock in London commonly known as "Big Ben" is 11.25' from the center of the clock to th
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Answer:

33.15 square inches.

Step-by-step explanation:

Given:

Length of the minute hand is 11.25' from the center of the clock to the tip of the hand.

<u>Question asked:</u>

What is the area swept out by the minute hand as it moves 5 minutes of time?

Solution:

<u><em>As length of the minute hand is '11.25' from the center of the clock to the tip of the hand means radius of the circle, r = 11.25 inches.</em></u>

First of all we will find area of circle swept by the minutes hand,

Area\ of\ circle=\pi r^{2}

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When minute hand moves 60 minutes, it makes one circle of area 397.77 square inches.

By using<u> unitary method</u>, we will calculate area swept by minute hand in 5 minutes:-

In 60 minutes, area swept = 397.77 square inches

In 1 minute, area swept = \frac{397.77}{60}

In 5 minutes, area swept = \frac{397.77}{60}\times5=\frac{1988.85}{60} =33.15\ square\ inches

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8 0
4 years ago
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3 years ago
The first bricklayer can build a wall in 15 days, the second bricklayer can build the same wall in 20 days. How long will it tak
Ugo [173]

Answer:

It takes <u>8  4/7 </u>days for both bricklayers to build the wall together.

Step-by-step explanation:  

The first bricklayer takes 15 days to build the wall, which means it builds 1/15 of the wall per day.

The second bricklayer takes 20 days to build the wall, which means it builds 1/20 of the wall per day.

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