How does music transfer to my ears from my phone and a wireless speaker?

energy and electricity

Step-by-step explanation:

hope that help with you question

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

the answer would be 150 books

step-by-step explanation:

if you divide 300 by 2 you will get 150