Question

sam is comparing the half - life of two isotopes of uranium. the half - life of uranium - 238 is 4.5×10^9 years. the half - life of uranium - 233 is 1.6×10^5 years. he computed how much greater the half - life of uranium - 238 is than that of uranium - 233, and his calculator displayed the number 2.81e4. what is this number in scientific notation? (1 point)

○ 2.81×10^(-4)

○ 2.81 + 10^4

○ 2.81×10^4

○ 4×10^2.81

Explanation:

Step1: Understand E - notation

In calculator E - notation, aEb means \(a\times10^{b}\).

Step2: Convert 2.81E4

2.81E4 means \(2.81\times10^{4}\).

Answer:

C. \(2.81\times 10^{4}\)