Witch number is written in scientific notation? 4.5x10^-3 14.5x10^2 0.78x10^-6 5.7x4^8

You are remodeling your kitchen. you’ve contacted two tiling companies who gladly told you how long it took their workers to tile of a similar size jim completed half the floor in 8 hours. pete completed half of the other floor in 7 hours. if pete can lay 20 more tiles per hour than jim, at what rate can jim lay tiles

Apatient is to be given 35 milligrams of demerol every 4 hours. you have demerol 50 milligrams/milliliter in stock. how many milliliters should be given per dose?

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test