HELP PLEASE DONT IGNORE Benny says you can write 0.000000215 as
In scientific notation. Do you agree with him? Explain why or why not?

please no links and don't answer unless your gonna help ​

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?

What is the similarity ratio of a cube with volume 729m^3 to a cube with volume 3375 m^3

What is the the greatest common factor ?