Scientific notation is a way to express very large or very small numbers. For very large exponent is positive; for very small exponent is negative. For example, 1,000,000 is 1 x 10 to the plus 6 exponent; 0.000001 is 1 x 10 to the negative 6 exponent
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Scientific notation can use both positive and negative exponents. And scientific notation doesn't consist solely of exponents. There is also a base, and a mantissa.
Exponents are negative numbers. This is used in math a lot.
Very very small numbers as for example 0.00000078 = 7.8*10^-7 in scientific notation
Scientific notation is a way to write very large or very small numbers using exponents. For example 2000 is 2x103 . We can do the same thing with negative exponents and write very small numbers like 1/2000 which is 2x10-3 . So one real life use of exponents in in scientific notation.
6.52445 × 104
Yes, except for zero. Numbers larger than 1 have positive exponents, and numbers between 0 and 1 have negative exponents. Negative numbers would just have a '-' in front.