the total mass of a book and water bottle was 4/5 kilograms. The mass of the water bottle was 1/2 kilograms. What was the mass of the book?

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30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles

answer:

125 yards

explanation:

75+50=125. that is my answer