Sam is comparing the half-life of two isotopes of uraniumThe half-life of Uranium238 is 4.5 * 10 ^ 9 yearsThe half-life of Uranium-233 is 1.6 * 10 ^ 5 years. He computed how much greater the half-life of Uranium-238 is than that of Uranium- 233, and his calculator displayed the number 2.81E4What is this number in scientific notation? (1 point)
The number 2.81E4 is already in scientific notation. In expanded form, it would be 28,100.
The number 2.81E4 in scientific notation is 2.81 × 10^4.
The number 2.81E4 is already in scientific notation. In scientific notation, numbers are expressed as a coefficient multiplied by a power of 10. The coefficient 2.81 is multiplied by 10 raised to the power of 4, or 10^4. This indicates that 2.81E4 is equal to 2.81 multiplied by 10,000.
