Is (2,4)(-3,5)(-1,4)(5,4) a function

Question 3 of 30 paul buys fruit to make smoothies. he buys 3.78 pounds of apples, 2.12 pounds of peaches, and 4.45 pounds of oranges. paul rounds each weight to the nearest tenth of a pound. about how many pounds of fruit did paul buy? (a) 10.5 pounds (b) 10.2 pounds (c) 10.4 pounds (d) 10.0 pounds 30 points

What situation is an example of an observational study

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