There are currently 21 frogs in a (large) pond. the frog population grows exponentially, tripling every 7 days. how long will it take (in days) for there to be 150 frogs in the pond?

Of four points are collinear, they are also coplanar

Find the value. a. 0.003 b. 0.03 c. 0.3 d. 3

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?