As the temperature of seawater increases from 15oC to 20oC, sound velocity through the seawater a remains remains the the same. same.
b increases
c decreases
d depends depends on on the the distance distance of of the the observer observer from from the the sound sound source.

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)

im srry but ur wrong the answer is d a smooth rock, some red dirt, and an empty bird's nest.

a cold ice-tea.

pour in room temperature or cold water. cover the pitcher and refrigerate. steep white or green tea for 6 to 8 hours; steep black or oolong tea for 8 to 12 hours.jun 28, 2015