Which of the following is radiant energy? A; sound

B'gasoline

C;light

D;food

C.Light

Explanation:

light is a visible form of radiant energy that travels in waves it is the only form of energy that can be seen by the human eye aside from the sunlight energy is given off by other stars light bulbs lasers and hot dog fix light energy is very useful as it helps us to see the world around us.

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me