Question

Multiply (2.0 ⋅ 10−4) ⋅ (3.1 ⋅ 10−20). Express the answer in scientific notation. The options are:

A: 6.2 ⋅ 10−80
B: 6.2 ⋅ 10−24
C: 6.2 ⋅ 1024
D: 6.2 ⋅ 1080

Answer 1

(2.0×10^-4)×(3.1×10^-20)
=(2.0×3.1)×(10^4×10^-20)
=6.2×10^(-4+(-20))
=6.2×10^-24. Hope it help!