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?(1 point) Responses 4×102.81 4 times 10 superscript 2.81 baseline 2.81×104 2.81 times 10 superscript 4 baseline 2.81×10−4 2.81 times 10 superscript negative 4 baseline 2.81+104 2.81 plus 10 superscript 4 baseline
The number 2.81E4 in scientific notation is 2.81×10^4.
The number 2.81E4 is expressed in scientific notation as 2.81×10^4
The number that Sam's calculator displayed, 2.81E4, is already in scientific notation. "E4" represents multiplying the number by 10 to the power of 4. So, 2.81E4 is equal to 2.81 × 10^4. Therefore, the correct answer is 2.81 × 10^4.
