250 written in index form = 2.5 × 102
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In index form, 250 can be expressed as 5^3. This is because 5 multiplied by itself three times (5 x 5 x 5) equals 250. Index form is a way to represent a number as a base raised to a power, where the power indicates how many times the base is multiplied by itself.
It is: 2*53 = 250
2x2x2x2
18 * * * * * No! 2*3*5 = 30
40.000000 in standard index form is 4.0 × 101