2 years ago

Express 28/1000 in decimals

Mathematics

1 answer:

AfilCa [17]2 years ago

3 0

Answer:

28/1000 in decimal is 0.028

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Answer:

Given:

$\textsf{Mass of a dust particle} = \sf 7.5 \times 10^{-10}$

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To calculate how many electrons have the same mass as one dust particle, divide the mass of a dust particle by the mass of an electron:

$\begin{aligned}\implies \dfrac{\textsf{Mass of a dust particle}}{\textsf{Mass of an electron}} & = \sf \dfrac{7.5 \times 10^{-10}}{9.1 \times 10^{-31}}\\\\& = \sf \dfrac{7.5}{9.1} \times \dfrac{10^{-10}}{10^{-31}}\\\\& = \sf 0.8241... \times 10^{(-10-(-31))}\\\\& = \sf 0.8241... \times 10^{21}\\\\& = \sf 8.2 \times 10^{20}\end{aligned}$