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geniusboy [140]
2 years ago
14

The minute hand on a watch is 14 millimeters. In the course of an hour, how much area does it cover? Leave answers in terms of π

.
Mathematics
1 answer:
Lesechka [4]2 years ago
8 0
In an hour the minute hand goes all the way around, or a 360 loop. so it's its \pi times the radius squared.
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If tge angle at the center is 62° and the radius is 12 cm.. find the length of arc​
insens350 [35]

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Step-by-step explanation:

r = 12 cm

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3 0
3 years ago
When two computers are working together, they can finish updating software in 9 minutes. How long would they take individually t
tensa zangetsu [6.8K]
First computer takes x min. For 1 min it does 1/x part of work.

Second computer takes (x+24) min. For one min it does 1/(x+24) part of work.

Both computers for one min do   (1/x+1/(x+24)) part of work.

At the same time, both computers for one min do 1/9 part of work.

\frac{1}{x} + \frac{1}{x+24} = \frac{1}{9} 
\\ \\  \frac{x+24+x}{x(x+24)} =  \frac{1}{9} 
\\ \\9(2x+24)=x^{2} +24x
\\ \\ 18x+216=x^{2} +24x
\\ \\ x^{2}+6x-216=0
\\ \\ D=b^{2}-4ac=36+4*216 = 900
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\\ \\ x_{1}=-18, x_{2}=12

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for the first computer x=12 min,

 for second computer x+24=12+24= 36 min

Answer 12 min and 36 min.


7 0
3 years ago
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