Question

Express $(3000{)}^2\times (20{)}^3$ in scientific notation:

• A. $7.2\times {10}^{10}$
• B. $3.6\times {10}^8$
• C. $6\times {10}^9$
• D. $4.8\times {10}^{12}$

Answer 1

The correct option is A $7.2\times {10}^{10}$

${3000}^2\times {20}^3=(9\times {10}^6)\times (8\times {10}^3)=72\times {10}^9=7.2\times {10}^{10}$

So correct answer will be option A