exam Maths Puzzle Numerical Ability

how do you write 51,000,000 in scientific notation?

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exam Other Question

I have a cylinder 48" tall & 30" in diameter. How many gallons will it hold? An aquarium is 4 ft x 15 inches x 1 yard.

a. Find the volume in cubic feet.
b. Find the weight of the water in pounds.
c. How many gallons of water will the aquarium hold?