A) Work out Give (5 x 10^3) * (9 x 10^7) your answer in standard form.

$\huge\text{Hey there!}$

$\mathsf{(5*10^3) * (9*10^7)}$

$\mathsf{= (5* 10* 10* 10)* (9* 10*10*10* 10*10*10* 10)}$

$\mathsf{= (5* 100* 10) * (9* 100* 100* 100 * 10)}$
$\mathsf{= (5* 1,000) * {(9* 10,000* 1,000)}}$

$\mathsf{= (5,000)*(90,000*1,000)}$

$\mathsf{= (5,000)* (90,000,000)}}$

$\mathsf{= 5,000* 90,000,000}}$

$\mathsf{= 450,000,000,000}$

$\mathsf{= 4.5*10^(11)}$

$\huge\text{Therefore, your answer should be: \boxed{\mathsf{4.5* 10^(11)}}}\huge\checkmark$

$\huge\text{Good luck on your assignment \& enjoy your day!}$

~
$\frak{Amphitrite1040:)}$

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