what is myocardial infraction?

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Myocardial infraction is commonly known as a heart attack, is the interruption of blood supply to part of the heart, causing some heart cells to die.

Expert answered|Jeana_LK|Points 978|

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Asked 9/21/2009 7:54:03 AM

Updated 1/15/2014 1:31:00 PM

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Edited by jeifunk [1/15/2014 1:30:59 PM], Confirmed by jeifunk [1/15/2014 1:31:00 PM]

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A one-dollar coin should have a mass of 7.0 g. Each individual coin may be lighter or heavier by as much as 2.14%. Joshua has a number of these coins and determines that they have a total mass of 1 kg. What is the di?erence between the greatest possible number and the least possible number of these coins that he could have?

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Updated 100 days ago|8/27/2025 12:01:38 PM

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cruz30

Find minimum and maximum mass per coin
min mass = 7.0 × (1 0.0214) = 7.0 × 0.9786 = 6.8502 g
max mass = 7.0 × (1 + 0.0214) = 7.0 × 1.0214 = 7.1498 g
Convert total mass to grams
total mass = 1 kg = 1000 g
Find greatest possible number of coins (coins as light as possible)
N_max = floor(1000 ÷ 6.8502) = floor(145.988…) = 145
Find least possible number of coins (coins as heavy as possible)
N_min = ceil(1000 ÷ 7.1498) = ceil(139.86…) = 140
Difference
Difference = N_max N_min = 145 140 = 5
Answer: 5.

Added 100 days ago|8/27/2025 12:01:34 PM

This answer has been confirmed as correct and helpful.