2.1×10^5 is equal to 210,000.
2.1×10^4 is equal to 21,000.
False. 2.1×10^5 is not equal to 2.1×10^4. The exponent in scientific notation represents the number of zeros following the first non-zero digit. In this case, 2.1×10^5 means that there are five zeros following the 2.1, which gives us the value 210,000. On the other hand, 2.1×10^4 means four zeros following the 2.1, resulting in the value 21,000. Therefore, the two values are not equal.
