Hint: SD equals start fraction X sub H minus X sub L over six end fraction comma where SD is the standard deviation, XH is the high value, and XL is the low value Hint: ME equals plus or minus two times start fraction SD over square root of N end square root end fraction comma where SD is the standard deviation and N is the sample size

Part A: What is the margin of error (ME) for this study? Show your work. (2 points)

Part B: What can the researcher conclude from this study? Explain using complete sentences. (2 points)

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Logan wants to know how many skateboards have defective parts. he inspects 20,000 skateboards and keeps track of the number of defects per board. use his probability distribution table to find the expected value for defects on a skateboard.

1- is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis. 2- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis. 3- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in part b?

If a 36 inch yardstick casts a 21 foot shadow, how tall is a building whose shadow is 168 feet? what is the scale factor