Answer:
![1 \cdot 10^7 +2 \cdot 10^6+ 4 \cdot 10^5+ 3 \cdot 10^4](https://tex.z-dn.net/?f=1%20%5Ccdot%2010%5E7%20%2B2%20%5Ccdot%2010%5E6%2B%204%20%5Ccdot%2010%5E5%2B%203%20%5Ccdot%2010%5E4)
Step-by-step explanation:
write 12,430,000 in expanded form using exponents
First we write the expanded form of each digit
1 is in ten millions place , 1 times 10,000,000
2 is in millions place , 2 times 1,000,000
4 is in hundred thousands place , 4 times 100,000
3 is in ten thousands place , 3 times 10,000
Now we write it in expanded form
![1 \cdot 10,000,000 +2 \cdot 1,000,000 + 4 \cdot 100,000+ 3 \cdot 10,000](https://tex.z-dn.net/?f=1%20%5Ccdot%2010%2C000%2C000%20%2B2%20%5Ccdot%201%2C000%2C000%20%2B%204%20%5Ccdot%20100%2C000%2B%203%20%5Ccdot%2010%2C000)
![1 \cdot 10^7 +2 \cdot 10^6+ 4 \cdot 10^5+ 3 \cdot 10^4](https://tex.z-dn.net/?f=1%20%5Ccdot%2010%5E7%20%2B2%20%5Ccdot%2010%5E6%2B%204%20%5Ccdot%2010%5E5%2B%203%20%5Ccdot%2010%5E4)