Question

What is 5.5×104
5.5
×
10
4
multiplied by 2.2×10−8
2.2
×
10
−
8
? Write the answer in scientific notation.(1 point)
Responses

12.1×10−4
12.1
×
10
−
4

12.1 times 10 superscript negative 4 baseline

1.21×10−5
1.21
×
10
−
5

1.21 times 10 superscript negative 5 baseline

1.21×10−3
1.21
×
10
−
3

1.21 times 10 negative cubed

1.21×10−4

Answer 1

(5.5×10^4)(2.2×10^−8) = (5.5·2.2)×10^(4−8) = 12.1×10^−4 = 1.21×10^−3.

Answer: 1.21×10^−3.