21. A cylindrical pipe touches a wall and the ceiling of a room. The pipe is supported by
a brace. The ends of the brace are 85 cm
from the wall and ceiling. Apply what you
discovered in question 16. What is the
diameter of the pipe? Give the answer to the
nearest centimetre.
85 cm
85 cm​

Amodel rocket is launched from a roof into a large field. the path of the rocket can be modeled by the equation y = -0.04x^2 + 8.6x + 4.8, where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters, of the rocket above the ground. how far horizontally from its starting point will the rocket land? a. 0.56 m b. 215.56 m c. 431.11 m d. 215.74 m

72 the length of a side of a triangle is 36. a line parallel to that side divides the triangle into two parts of equal area. find the length of the segment determined by the points of intersection between the line and the other two sides of the triangle.

What is the area of the shaded sector?