Question

the oldest rocks on earth are about 4×10^9 years old. for which of these ages could this be an approximation? select all that apply. a. 4,149,000,000 years b. 3.849999999×10^9 years c. 3,862,100,000 years d. 0.000000004 years e. 3.45×10^9 years

Explanation:

Step1: Compare values to $4\times10^{9}$

We check each option against the approximate age of the oldest rocks $4\times10^{9}$ years.

Step2: Analyze Option A

$4,149,000,000 = 4.149\times 10^{9}$ which is close to $4\times 10^{9}$.

Step3: Analyze Option B

$3.849999999\times 10^{9}$ is also close to $4\times 10^{9}$.

Step4: Analyze Option C

$3,862,100,000=3.8621\times 10^{9}$ is close to $4\times 10^{9}$.

Step5: Analyze Option D

$0.000000004 = 4\times 10^{-9}$ is not close to $4\times 10^{9}$.

Step6: Analyze Option E

$3.45\times 10^{9}$ is close to $4\times 10^{9}$.

Answer:

A. 4,149,000,000 years
B. $3.849999999\times 10^{9}$ years
C. 3,862,100,000 years
E. $3.45\times 10^{9}$ years