Express the following numbers in standard form. [A] 509.78 [B] 0.0289 Can someone please help me ? I need to answer that questio n by 12.00 PM. Help me please.
2 answers:
Answer:
(A) 509.78
We need to move the decimal point after the first non-zero digit
So,
=> 5.0978 × 10² (Since the decimal point is moved two places to the left)
(B) 0.0289
Again after the first non-zero digit:
So, it becomes:
=> 2.89 × 10⁻² (Since the decimal point is moved 2 places to the right so it will be negative also)
Answer:
[A] 5.0978 × 10²
[B] 2.89 × 10⁻²
Step-by-step explanation:
The decimal point must be after the first non-zero digit of the number.
5.0978
The decimal needs to be multiplied by a number that leads to 509.78. That number is 100 or 10².
5.0978 × 10²
Once again, the decimal point must be after the first non-zero digit of the number.
2.89
The decimal needs to be multiplied by a number that leads to 0.0289. That number is 0.01 or 10⁻².
2.89 × 10⁻²
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