F(t)=-16t^2+144t. after how many seconds does the toy rocket hit the ground?

An object in geometry with no width, length or height is a(n):

Which equation represents a direct linear variationa. y=x2b. y=2/5xc. y=1/xd. y=x+3

He trapezoid is composed of a rectangle and two triangles. what is the area of the rectangle? what is the total area of the triangles? what is the area of the trapezoid? ? a) 42 cm2; 27 cm2; 69 cm 2 b) 54 cm2; 27 cm2; 81 cm 2 c) 108 cm2; 27 cm2; 135 cm 2 d) 108 cm2; 13.5 cm2; 121.5 cm 2