anonymous
  • anonymous
An underground mine elevator descends 12% of the total depth every minute. The total depth of the elevator is 75 meters below the ground. How many meters below the ground is the elevator after 2 minutes? A: -18 meters B: -9 meters C: -4.5 meters D: -22.5 meters
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
@vera_ewing can you please help me :) Please?
mathstudent55
  • mathstudent55
If it descends 12% of the total length in 1 minute, how much percent does it descend in 2 minutes?
anonymous
  • anonymous
24% @mathstudent55

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mathstudent55
  • mathstudent55
Correct. Now you need to find what 24% of 75 meters is.
mathstudent55
  • mathstudent55
What is 24% of 75 = ? To find a percent of a number, divide the percent by 100 and multiply by the number. 24% of 75 = = 24/100 * 75 = 0.24 * 75
anonymous
  • anonymous
which is 18?
anonymous
  • anonymous
@mathstudent55
anonymous
  • anonymous
so its -18?
jim_thompson5910
  • jim_thompson5910
Correct. It descends 9 m every min, so after 2 min, it's at the -18 m mark.
anonymous
  • anonymous
Thank you Guys Soooooo much I r eally Apreciate it :) @mathstudent55 @jim_thompson5910
jim_thompson5910
  • jim_thompson5910
no problem
mathstudent55
  • mathstudent55
Yes, since 24% of 75 m is 18 m, it descends 18 m in the first two minutes. Since it is descending, it is losing altitude, so you can call the displacement -18 m. (Strictly speaking, the way the question was asked, the answer should be 18 m, not -18 m, but you don't have such a choice.)
mathstudent55
  • mathstudent55
You're welcome.

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