Which of the following statements describes the
relationship between the epicenter and focus of
an earthquake?
a. the focus is the point on earth's surface where
the epicenter of an earthquake is located.
b. the epicenter is the point on earth's surface
that lies directly above the focus.
c. the epicenter is the point where an
earthquake occurs, and the focus is where
seismic waves reach earth's surface.
d. the focus is deeper within the earth than the
epicenter is.

The answer is B: The epicenter is the point on Earth's surface

I believe the answer is B. The epicenter is the point on Earth's surface

Explanation:

c)as speed changes, wavelength and frequency change.

everything changes!

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.)