$2.7 \times 10^9$ gallons of water in an hour
Work Step by Step
$(7.5 \times 10^5) \times 3600$ $=(7.5 \times 10^5) \times (3.6 \times 10^3)$ $=27 \times 10^8$ $=2.7 \times 10^9$ gallons of water in an hour
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