2 to the 4th power times 5 to the 3rd power = 2,000
1.657 times 10 to the 4th power = 16,570
2 times 10 to the 3rd power = 2,000
10 to the 4th power, written as (10^4), equals 10,000. This is calculated by multiplying 10 by itself four times: (10 \times 10 \times 10 \times 10 = 10,000).
1/12
Oh, dude, when you multiply powers with the same base, you just add the exponents. So, 10 to the 3rd power is 10 x 10 x 10 (which is 1,000), and 10 to the 4th power is 10 x 10 x 10 x 10 (which is 10,000). When you multiply them together, it's like adding the exponents, so it's 10 to the 7th power, which is 10 million. Easy peasy, lemon squeezy.
20,000
The question cannot be answered - in 3rd standard or elsewhere - because it does not say 10 times WHAT!
.002519
180,000
5,000
256,000