An object is located 5.0 cm from a concave mirror. the focal length is 15.0 cm. what is the image distance? use the equation attached. a.3.8 cm b.-3.8 cm c.-7.5 cm d.7.5 cm

-7.5 cm

Explanation:

OK so in the equation they're having you use the variables are:

So we simply plug in the variables:

it would be c. predictability

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