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)

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. What is this number in scientific notation?(1 point)

Responses

2.81+104
2.81 plus 10 superscript 4 baseline

2.81×104
2.81 times 10 superscript 4 baseline

2.81×10−4
2.81 times 10 superscript negative 4 baseline

4×102.81

Answer 1

The number 2.81E4 is in scientific notation, represented as 2.81 × 10^4.

Answer 2

The number 2.81E4 in scientific notation is 2.81×10^4.

Answer 3

To convert the number 2.81E4 to scientific notation, we need to move the decimal point four places to the right and multiply by 10 raised to the power of 4. Therefore, the correct scientific notation representation for 2.81E4 is 2.81×10^4.