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. What is this number in scientific notation?
The number 2.81E4 in scientific notation is 2.81 × 10^4.
The number 2.81E4 is already in scientific notation. "E4" represents multiplying the number by 10 to the power of 4. Therefore, 2.81E4 is equal to 2.81 × 10^4.
