Question

Multiply. (8×10^2)⋅(2.5×10^2) A.2×102 ​ ​ B.2×103 ​ ​ C.2×104 ​ ​ ​ D.2×105 ​ ​

Answer 1

$(8 \times {10}^{2} )(2.5 \times {10}^{2}) \\ = (8 \times 2.5) \times {10}^{2 + 2} \\ = 20 \times {10}^{4} \\ = 2 \times 10 \times {10}^{4} \\ = 2 \times {10}^{4 + 1} \\ = 2 \times {10}^{5}$
The answer is D.

Answer 2

Answer:

2×105 ​ ​

i took test it is D