Answer:
[tex]3 \times {10}^{12} [/tex]
Step-by-step explanation:
[tex] \: \: \: \: \: (5 \times {10}^{7} )(6 \times {10}^{4} ) \\ = 5 \times 6 \times {10}^{7} \times {10}^{4} \\ = 30 \times {10}^{7 + 4} \\ = 3 \times 10 \times {10}^{11} = 3 \times {10}^{12} [/tex]
