Question

scientific notation of 4.2×0.05​

Answer 1

Answer:

2.1×10^-1

Step-by-step explanation:

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Answer 2

$\bold {4.2\times 0.05}$ = $\bold {210\times 10^-^3}$

Step-by-step explanation:

Given expression,

$4.2\times 0.05$

Scientific notation of the number is written as $a\times 10^n$ where the coefficient a has a value such that 1 ≤ a < 10 and n is an integer.

$4.2 = 42\times 10^-^1$

$0.05= 5\times 10^-^2$

$\bold {4.2\times 0.05}$ = $42\times 10^-^1\times 5\times 10^-^2$

                                        = $210\times 10^(^-^1^-^2^)$

                                        = $\bold {210\times 10^-^3}$