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प्रश्न
You are downloading a song. The percent y (in decimal form) of megabytes remaining to get downloaded in x seconds is given by y = – 0.1x + 1 after how many seconds will 75% of the song gets downloaded?
उत्तर
When 75% of a song gets downloaded 25% remains.
In other words y = 25%
y = 0.25
By using the equation we get
0.25 = – 0.1x + 1
0.1x = 0.75
x = `0.75/0.1` = 7.5 seconds
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