140*2 + 0.14(600+1200) = 280 + 252 = 532
Hope it’s help you
Speed of dog =12
Speed of snowmobile= 52
12 miles per hour This is a fraction equal to
30 miles ÷ 2.5 hours
We want a unit rate where
1 is in the denominator,
so we divide top and bottom by 2.5
30 miles÷ 2.52.5 hours÷ 2.5=12 miles1 hour=12 mileshour= 12 miles per hour