Final answer:
To write 2.8×10⁰ as an ordinary number, we simply multiply 2.8 by 1.
Step-by-step explanation:
To write 2.8×10⁰ as an ordinary number, we need to consider the exponent of 10, which is 0 in this case. Any number raised to the power of 0 is 1. So, 10⁰ is equal to 1. Therefore, 2.8×10⁰ is simply 2.8 multiplied by 1, which is equal to 2.8.
Learn more about writing ordinary numbers