OG(11th)PS-Q129

[s934527]

On a recent trip, Cindy drove her car 290 miles, rounded to the nearest 10 miles, and used 12 gallons of gasoline, rounded to the nearest gallon. The actual number of miles per gallon that Cindy's car got on this trip must have been between

答案是 284/12.5 and 295/11.4


我看了解釋後還是不懂　284和295這兩個數字是怎麼出來的　尤其是284 <<<<它不是比較接近280嗎　　好怪　　




請大俠解惑　　　　thx

[oneseven]

再確認一下你的答案喔
我的OG上答案是 285/12.5 and 295/11.5