The amount of time is takes dora to commute to work is always within 5 minutes of the average number of minutes the commute take
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Before performing any calculation it's good to recall a few properties of integrals:
So we apply the first property in the first expression given by the question:
And we solve the second integral:
Then we take the last equation and we subtract 10 from both sides:
And we divide both sides by 2:
Then we apply the second property to this integral:
Then we use the other equality in the question and we get:
We substract 8 from both sides:
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