what is 5.5*10^4 multiplied by 2.2*10^-8 write the answer in scientific notation

1.21*10^-3
1.21*10^-5
1.21*10^-4
12.1*10^-4

3 answers

The answer is 1.21*10^-3.
a tape dispenser holds 1.14*10^4 mm of the tape that is 12.7 mm wide multiply the two numbers to find the total area in square millimeter's of tape write the product in scientific notation
14.478*10^5mm^2
1.4478*10^4mm^2
1.4478*10^5mm^2
14.478*10^4mm^2
The product is 1.4478*10^5 mm^2.