Ten to the eighth is100,000,000 so just move the decimal on the 8.343 over 8 places.
834,300,000
When multiplying two terms with the same base, you add the exponents. In this case, x to the fifth power times x to the third power would be x to the power of 5 + 3, which simplifies to x to the power of 8. So, x to the fifth power times x to the third power equals x to the eighth power.
16
One third times nine to the eighth power equals 14,348,907
1 times 10 to the eighth power is simply 10 to the eighth power, which equals 100,000,000. This represents the number 1 followed by eight zeros.
9.452 times 10 to the negative eighth power in standard notation is written as: 0.00000009452
208.44
378,000,000
93 times 95 is 98 (add the exponents) = 43046721
13 to the power of 3 = 2197
The expression (2 \times 3 \times 3 \times 3 \times 5) can be rewritten using exponents as (2^1 \times 3^3 \times 5^1). This indicates that 2 is raised to the power of 1, 3 is raised to the power of 3, and 5 is raised to the power of 1.
y2 * y-5 = y2 / y5 = 1/y3
Follow the law of exponents to get your answer. With the same base, add the exponents. You could just work it out: A^3 = A*A*A, so (A^3)*(A^3) = A*A*A * A*A*A = A^6 {A to the 6th power}