Final answer:
The correct product of the problem is 70 and 1.8 x 10³ expressed in scientific notation is 1.26 x 10⁵.\
Step-by-step explanation:
The product of 70 and 1.8 x 10³ expressed in scientific notation is calculated by multiplying the two numbers. To do this:
1. Multiply the numerical parts: 70 x 1.8 = 126.
2. Combine the powers of 10: 10° (from the 70, because 70 = 7 x 10±) and 10³. Since the exponents are the same base (10), you add the exponents: 0 + 3 = 3.
3. Therefore, the product in scientific notation is 1.26 x 10⁵ (since 126 = 1.26 x 10² and you need to add the exponent from the original power of 1.8 x 10³).
The correct answer to the question is option a. 1.26 x 10⁵.