Lee filled up his gas tank before starting a road trip. If he has used 5.8 gallons two hours into the trip, and has 12.4 gallons remaining, how many gallons of gas did he start with?

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

There is an entrance to the computer room at point e which lies on ab and is 5 feet from point a. plot point e on the coordinate plane. find the distance from the entrance at point e to the printer at point e

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?