Final answer:
In mathematics, index notation represents numbers or terms written in the form of a product with each number or term being repeated a certain number of times. In this case, 3x7x7x7x7 can be written as 3 x 7^4, which is equal to 3 x 2401. The result is 7203.
Step-by-step explanation:
When we see the expression 3x7x7x7x7, this is an example of index notation in mathematics.In index notation, the numbers or terms are written in the form of a product, with each number or term being repeated a certain number of times.
In this case, 7 is repeated 4 times, so we can write it as 7 to the power of 4, or 74.
Therefore, 3x7x7x7x7 can be written as 3 x 74, which is equal to 3 x 2401. The result is 7203.