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Hunan Education Edition Eighth Grade Mathematics Volume II Examination Paper
1、Q=40-5T

Make 40-5T=0

T=8 means that there will be no oil left after working for 8 hours.

2. Without images, it is impossible.

3.( 1)T (Celsius) =0-0.2*T (min) =-0.2T (min)

(2)0 & gt; =-0.2T (minimum) > =- 10

Then 0