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It is estimated that there are 7,500,000,000,000,000,000 grains of sand on all the beaches of the world. How is this number written in scientific notation? А 7.5 x 1015 B 7.5 x 1019 с 7.5 x 1017 D 7.5 x 1018

Respuesta :

[tex]=\text{ 7.5 }\times10^{18}\text{ (option D)}[/tex]

Explanation:

To write in scirentific notation, we start counting from the right towards the left. We start from the last number to the first number

Scientific notation:

[tex]\begin{gathered} 7.5\text{ }\times10^{number\text{ of movement to the first number }} \\ number\text{ of movement to the first number = 18} \\ =\text{ 7.5 }\times10^{18} \end{gathered}[/tex]

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