Aboy band has released two albums. their first album sold 5.9×10^5 copies. their second album sold 1.3×10^6 copies. how many total copies has this boy band sold?

The boy band sold  1.89 ×10^6 copies

Step-by-step explanation:

To get the number of copies we must add 5.9×10^5 copies with 1.3×10^6  copies.  We can´t add them  like that.

To make the addition we have to adjust the power of 10,  so they have the same index

In this case we can change  5.9×10^5 to 0.59×10^6 ( we move the comma to the left , and we add 1 power to the scientific quotation.

So, 0.59×10^6

+    1.3×10^6  

     1.89 ×10^6

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step-by-step explanation: