Question

sam is comparing the half-life of two isotopes of uranium. The half-life of uranium-238 is 4.5 × 10⁹ years. The half- life of uranium-233 is 1.6 × 10⁵ 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. Which is this number in scientific notation?
A. 2.81 × 10^-⁴
B. 4 × 10^2.81
C. 2.81 × 10⁴
D. 2.81 + 10⁴

Answer 1

The number 2.81E4 can be written in scientific notation as 2.81 × 10⁴. Therefore, the answer is C. 2.81 × 10⁴.