NEED HELP

the combines volume of all the tanks at an aquarium is 1.25*10^6 gallons. the aquarium plans to install a new dolphin tank with a volume of 250,000 gallons. what will be the total volume of all the tanks at the aquarium after the new dolphin tank is installed?

2 answers

hint

250,000 = 0.25 *10^6
1.25 + 0.25 = ?
times 10^6