9. adrian loves the pancakes! the problem is, the recipe serves only six, and he has 540
people in his family (including aunts, uncles, and cousins). now, he needs increasing
the recipe to feed his entire family. however, adrian is particular - he insists on using only
three significant figures with scientific notation. (7 points)

Which term best describes the association between variables a and b? no association a negative linear association a positive linear association a nonlinear association a scatterplot with an x axis labeled, variable a from zero to ten in increments of two and the y axis labeled, variable b from zero to one hundred forty in increments of twenty with fifteen points in a positive trend.

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?