Sam is comparing the half-life

Question

of two isotopes of uranium.
The half-life of Uranium-238 is
years. The half-life
of Uranium-233 is
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)
4.5 × 10
9
1.6 × 10
5
2.81 + 10
4
2.81 × 10
−4
4 × 10
2.81
2.81 × 10
4

Answer 1

The notation "2.81E4" represents the scientific notation \(2.81 \times 10^4\). Therefore, the correct answer is:

2.81 × 10^4