The graph represents the height y, in feet above the ground of a rock x seconds after it is dropped from a building. Which state
ment is true? Select each correct answer.
-the rock hits the ground in 45 s.
-the rock rises above 45 ft before falling toward the ground.
-the maximum height of the rock occurs at x=0
-the rock is in the air for 3 s.
-the Maximum height of the rock is 45 ft.
-the rock hits the ground in 45 s.
-the rock rises above 45 ft before falling toward the ground.
-the maximum height of the rock occurs at x=0
-the rock is in the air for 3 s.
-the Maximum height of the rock is 45 ft.
1 answer:
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Answer:
- see below for a drawing
- the area of one of the trapezoids is 20 units²
Step-by-step explanation:
No direction or other information about the desired parallelogram is given here, so we drew one arbitrarily. Likewise for the segment cutting it in half. It is convenient to have the bases of the trapezoids be the sides of the parallelogram that are 5 units apart.
The area of one trapezoid is ...
A = (1/2)(b1 +b2)h = (1/2)(3+5)·5 = 20 . . . . square units
The sum of the trapezoid base lengths is necessarily the length of the base of the parallelogram, so the area of the trapezoid is necessarily 1/2 the area of the parallelogram. (The area is necessarily half the area of the parallelogram also because the problem has us divide the parallelogram into two identical parts.)
Answer:
70% increase
Step-by-step explanation:
