To rewrite 4,543,000,000 years in scientific notation we must express it as a decimal between one and ten. To do that we divide it by 1,000,000,000 giving us 4.543 years. But the age of the earth is not 4.543 years. So to express this number correctly, we must show that it has to be multiplied by 1,000,000,000. So we can write this as 4.543 times 1,000,000,000. But this can be shortened further because 1,000,000,000 is equal to 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 which can be expressed as 109. So we can write the age of the earth in scientific notation as 4.543 x 109 years.
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Answer:
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Answer:
D. 4.543 x 109 years.
Step-by-step explanation:
To rewrite 4,543,000,000 years in scientific notation we must express it as a decimal between one and ten. To do that we divide it by 1,000,000,000 giving us 4.543 years. But the age of the earth is not 4.543 years. So to express this number correctly, we must show that it has to be multiplied by 1,000,000,000. So we can write this as 4.543 times 1,000,000,000. But this can be shortened further because 1,000,000,000 is equal to 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 which can be expressed as 109. So we can write the age of the earth in scientific notation as 4.543 x 109 years.