What would be the answers to these?

1. The combined volume of all the tanks at an aquarium is 1.25×10 to the sixth power gallons. The aquarium plants 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? A.1.5×10 to the fifth power. B. Three. 75×10 to the fifth power. C. 1.5×10 to the six power or D. 3.75×10 to the six power ........ 2. At a given time Saturn was 9.1×10 to the eighth power miles from the sun and earth was 9.3×10 to the 7th miles from the sun. By what distance is one planet closer to the sun than the other planet? A period 2×10 to the first power B. 2×10 to the 15th power C. 8.17×10 to the seventh power or D. 8.17×10 to the eighth power