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3 years ago

The minute hand of a clock is 8 inches long and moves from 12 to 8 o’clock. How far does the tip of the minute hand move?

Mathematics

2 answers:

NeX [460]3 years ago

6 0

if the minute hand is 8 inches long, it shows the radius of the circle of the clock.

thus, the circumference of the circle (boundary)= 2πr

= 2X 3.14 X 8 ( wherein, r= radius= 8; π= 22/7 or 3.14)

= 50.27 inches.

The length between each two consecutive no.s on the clock = 50.27/12 = 4.19

Thus, the length moved n=by the tip of the minute hand= 4.19X8

= 33.44 inches

Hope that this would be correct .

ryzh [129]3 years ago

3 0

The minute hand is like an eight inch radius of a circle, whose circumference would equal 2 * PI * 8 = 50.265 inches. By moving to 8 o'clock, it travels 2/3 of the circumference or 50.265 * 2/3 = 33.510 inches

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A regular trapezoid is shown in the picture attached.

We know that:
DC = minor base = 4
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AD = BC = lateral sides or legs = 5

Since the two legs have the same length, the trapezoid is isosceles and we can calculate AH by the formula:

AH = (AB - DC) ÷ 2
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Now, we can apply the Pythagorean theorem in order to calculate DH:
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<h2>Answer with explanation:</h2>

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Standard deviation : $\sigma=2.8$

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