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2 years ago

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The minute hand of the clock is 5 inches long. How far does the tip of the minute hand move in 4 full rotations? Calculate your

answer using the pi button on your calculator and round to the nearest tenth of an inch.

2 answers:

omeli [17]2 years ago

5 0

Assuming the clock to be round in shape, we can treat the minute hand length as the radius of the circle.

We want to know the length, in inches, of 4 full rotations.

1 full rotation length is the circumference of the circle with radius 5 <u>(minute hand is radius and has length 5 inches)</u>. We use the formula of the circumference of a circle to get length in 1 rotation:

$C=2\pi r\\C=2\pi (5)\\C=10\pi$

So for 4 full rotations, the length covered is $4*10\pi=40\pi$ inches.

Rounding to nearest tenth of an inch, we have:

$40\pi=125.7$ inches

ANSWER: $40\pi$ or 125.7 inches

butalik [34]2 years ago

3 0

4 full rotations = 4 * 2πr = 40π is 125.7 inches

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Courtney has a total of 88 stamps worth $15.56. Some are 25 cent stamps and some 2 cent stamps. How many of each does she have

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<span>88 stamps -------------------- > $15.56
A------------------------------>number of </span>stamps ------------ ><span>25 cent
B----------------------------- > </span>number of stamps ------------ >2 cent

A+B=88------------------ > A=88-B
0.25A+.02B=15.56
resolving
0.25(88-B)+0.02B=15.56
22-0.25B+0.02B=15.56
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icang [17]

Answer:

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Step-by-step explanation:

let l be the length and w be the width of the rectangle respectively;

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or

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The quadratic equation is in the form of $ax^2+bx+c = 0$

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For $w \approx 1.62$

$D = 1.62 +2 \approx 3.62$

For $w \approx -0.62$

$D =-0.62 +2 \approx 1.38$

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