1. a scientist records the mass of a proton as 0.16726231 grams. use a single digit times a power of 10 to estimate the mass

2. the tanks at the georgia aquarium holds approximately 8.4 x 10 to the sixth gallons of water. the tank at the aububon aquarium of the americas hold about 400,000 gallons of water, use a single digit times a power of 10 to estimate how many times greater the amount of water is at the georgia aquarium?