Answer:
√9
Step-by-step explanation:
√9 is a rational number because it's a perfect square.
Answer:
SSS
Step-by-step explanation:
SSS
Answer: 
Step-by-step explanation:
By definition scientific notation has the following form:

Where a is a number between 1 and 10 but not including 10, and the exponent b is an integer.
The decimal point must be after the first digit.
Therefore, keeping the information above on mind, you can write the number as following:

Answer:
the answer is 7.5 sure
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