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?

1)   682,000, 000  ~    700, 000, 000   =     7  *  10^8

7 * 10^8 / 7 * 10^9

7 / 7 * 10^8 / 10^9  

1 * 1 / 10

Answer >    1 / 10

About one -tenth of the population is left-handed, which is equal to 10%.

2):    8,000,000,000,000      =    8 * 10^12

Lake Ontario / Atlantic Ocean

2 * 10^16 / 8 * 10^12   =   2 / 8 * 10^16 / 10^12

1 / 4 * 10^4

0.25 * 10^4

Answer  >  2,500

Therefore,  It will take 2,500 Lake Ontario's to fill the Atlantic Ocean.

Hope that helps                                            : )

the answer is c. hope this !

step-by-step explanation:

da freeck kinda math is this just drop out

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