Mathematics, 11.07.2019 01:30, angelapegues20097

Can anyone explain these problems to me? we didn't go over them in class before they were assigned as home work. the estimated world population is 7 times 10 to the 9th power. of the total population 682 million of those people are lefties. about what percentage of the world are lefties? the atlantic ocean contains about 2 times 10 to the 16th power gallons of water. lake ontario contains 8,000,000,000,000 gallons of water. about how many lake ontarios would it take to fill the atlantic ocean?

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Can anyone explain these problems to me? we didn't go over them in class before they were assigned...