Assume that a set of test scores is normally distributed with a mean of 80 and a standard deviation of 10. Use the 68-95-99.7 rule to find the following quantities.

a. The percentage of scores less than 80 is _%.

Which questions would most a reader identify the author's purpose for writing? check all that apply. what type of text is this? what type of reviews did the book receive? how many copies of the book have been sold? what is the central idea? how does this text make one feel?

Which number line correctly shows 0.8 + 0.3?

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