What kind of lens is found in both a magnifying glass and a microscope

You are about to open a container of soy milk but notice that there are instructions to “shake well before serving.” the soy milk is most likely a

Light from the sun reaches the earth in 8.3 minutes. the velocity is 3.00 x 10^8 m/s. how far is earth from the sun? i know how to get to d = (3 x 10^8 m/s)(498 sec). i just don't know how to get from there to the answer being 1.5 x 10^11 m.

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?