Final answer:
The best estimate for (2.8 x 10²) (4.1 x 10⁶) in scientific notation is 1.148 x 10⁸.
Step-by-step explanation:
To find the best estimate for (2.8 x 10²) (4.1 x 10⁶) in scientific notation, we need to multiply the coefficients and add the exponents. The product of 2.8 and 4.1 is 11.48, and the sum of the exponents 2 and 6 is 8. Therefore, the best estimate in scientific notation is 1.148 x 10⁸. Answer choice A) 7 x 10⁸ is the closest, but it's not the best estimate.