17. A tennis ball is dropped from the top of a tall building. The ball's height, in meters, 1 seconds after it is released is h(t) = 4.912 +20 + 50
When is the ball 20 meters above the ground? (2 decimal places) (hint: set = 20 and solve for x)

a net is a diagram that shows a “flattened” view of a solid. in a net, each face and base is shown with all of its dimensions. a net can also serve as a pattern to build a three-dimensional solid.

a pyramid is a three-dimensional object with a base that is a polygon and triangular faces that meet at one vertex.

" the net of a triangular pyramid consists of four triangles. the base here we are given of the pyramid is a equilateral   triangle, and the lateral faces are also triangles "

my guess would be b and d, but i didn’t actually get out the pen and paper. lol

60

step-by-step explanation:

every triangle measures a total of 120 degrees. you have to find angle c. we know that isosceles triangles angles are equal. 60 degrees plus 60 degrees gives you 120.