What does determine the distance between the high and low temperature mean?

Find the area of a trapezoid with a height of 23, base 1 of 10 and base 2 of 18

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?

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.