Which levels need to be correct for cells to function? check all that apply. blood sugar food intake body water body temperature blood oxygen

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.

Which of the following is the best name for mgcl2

Ais not a mixture. colloid compound suspension solution