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
4×10^2.81
4 times 10 superscript 2.81 baseline
2.81×10^4
2.81 times 10 superscript 4 baseline
2.81+10^4
2.81 plus 10 superscript 4 baseline
2.81×10^−4
The number given by the calculator, 2.81E4, is already in a form of scientific notation commonly used in calculators and computers, where "E" stands for "times ten raised to the power of." To translate this into more conventional scientific notation as it would be written in a textbook or on paper, we would write it as:
2.81×10^4
2.81 times 10 superscript 4 baseline
This represents 2.81 multiplied by 10 raised to the power of 4.