What is the correct answer in scientific notation? 1.4x104 x 2.5x101 = ? ?

What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

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?

Evaluate cos2θ for cosθ = square root of 3/2