The last one because it can be traced like Jerome gets these cards from this place but others from a different place
The final expression in standard form will be 1.601 * 10^9
<h3>Indices and expoenets</h3>
Given the expression as shown:
800.5 * (2*10^6)
This can be further simplified as:
![= 8.005 * 10 ^2 * 2 * 10^6\\= 16.01 * 10^{2+6}\\= 16.01 * 10^8](https://tex.z-dn.net/?f=%3D%20%208.005%20%2A%2010%20%5E2%20%2A%202%20%2A%2010%5E6%5C%5C%3D%2016.01%20%2A%2010%5E%7B2%2B6%7D%5C%5C%3D%2016.01%20%2A%2010%5E8)
The final expression in standard form will be 1.601 * 10^9
Learn more on indices here: brainly.com/question/10339517
2x+4.7=77.8
double the unknown number then add 4.7