Which THREE forms of light are invisible light?

-1- blue light
-2- infrared rays
-3- radio waves
-4- red light
-5- x-rays

The infrared rays, radio waves and x-rays are forms of light are invisible light. Explanation: We know that, The electromagnetic spectrum shows the wave length of the electromagnetic radiation of visible light.

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Explanation:

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