Star's luminosity is the .
a. total amount of light that the star will radiate over its entire lifetime.
b. apparent brightness of the star in our sky.
c. lifetime of the star.
d. surface temperature of the star.
e. total amount of light that the star radiates each second.

e. total amount of light that the star radiates each second.

Explanation:

Solar luminosity is usually measured in Joules per second or Watt because it is a form of power.

It is defined as the total amount of electromagnetic energy emitted per unit of time by a star or other astronomical object. It measures the level of brightness and it’s also dependent on the temperature and surface area of the star or astronomical object.

e. total amount of light that the star radiates each second.

Explanation:

Star luminosity is the measure of the power of a star, or the amount of energy in joules per unit sec of time that a star emits.

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