In a study by researchers at the University of Maryland, the body temperatures of 106 individuals were measured; the mean for the sample was 98.20◦F. It is commonly believed that the mean body temperature is 98.60◦F. The difference between the sample mean and the accepted value is significant at the 0.05 level.

Which property is illustrated by the following statement? if hxa rgi, then rgi hxa.

Give all possible names for the line shown.calculation tip: lines can be written with either point first.

Kayla wants to find the width, ab, of a river. she walks along the edge of the river 65 ft and marks point c. then she walks 25 ft further and marks point d. she turns 90° and walks until her location, point a, and point c are collinear. she marks point e at this location, as shown. (a) can kayla conclude that δ and δ are similar? why or why not? (b) suppose de = 15 ft. what can kayla conclude about the width of the river?