Question

A boy band has released two albums. Their first album sold 5.9 \cdot 10^55.9⋅10 5 5, point, 9, dot, 10, start superscript, 5, end superscript copies. Their second album sold 1.3 \cdot 10^61.3⋅10 6 1, point, 3, dot, 10, start superscript, 6, end superscript copies. How many total copies has this boy band sold?

Answer 1

Given that the boy band released two albums with the first album selling $5.9\times10^5$ copies and the second album selling $1.3\times10^6$ copies.

The total number of copies the boy band has sold is given by

$5.9\times10^5+1.3\times10^6=0.59\times10^6+1.3\times10^6 \\ \\ =(0.59+1.3)\times10^6=1.89\times10^6\ copies$