Question

2. Perform the indicated operation. Write the result in scientific notation. (4 x 102) (3 x 105)

Answer 1

Starting with the expression:

$(4\times102)(3\times105)$

Solve first the expressions inside the parenthesis:

$(4\times102)(3\times105)=(408)(315)$

Multiply the numbers:

$(408)(315)=128520$

To write the number 128,520 in scientific notation, remember the following