Compare an echo to light that hits a mirror.

Explanation:

Say your in a big room and you scream Echo!!! That echo bounces off the wall of that big room. Same with light if your in a dark room with a mirror and you shine the light of a flashlight on it it bounces of the mirror right back at you.

I hoped I helped you! :)

emily ruth's annual premium is $1058.50

step-by-step explanation:

emily ruth is a female of 27 years age purchasing 20 year endowment insurance with face value $25000.

from the given table,

for females, the age of a male 3 years younger should be used.

so, we have to check for 24 year male for 20 year endowment.

it is 42.34 for every $1000 face value.

for a face value of $25000,

it is 25 * 42.34 = $1058.50

∴ emily ruth's annual premium is $1058.50

a coal burning power plant