Find the surface area of each pyramid. Round to the nearest tenth if necessary.

square pyramid: base side length, 6.4 ft; slant height, 10.3 ft

Group of answer choices

129.6 ft2

140.6 ft2

172.8 ft2

304.6 ft2

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?

Suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet.

Which expression is a perfect cube? a. x8 b. y24 c. m28 d. x64