Final answer:
The area of the rectangle is (3.2x10^4) x (2.5x10^6) which simplifies to 8x10^10.
Step-by-step explanation:
The area of a rectangle can be found by multiplying its length and width. In this case, the length is 3.2x10^4 and the width is 2.5x10^6. To multiply two numbers in scientific notation, you multiply their coefficients and add their exponents. So, (3.2x2.5) x (10^4 x 10^6) = 8 x 10^10. Therefore, the correct answer is a) 8x10^10.
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