Answer:
Step-by-step explanation:
I'm going to make some assumptions here before we start. The way you have typed this only gives 2 dimensions. Are we supposed to rotate this around an axis?
1) That it's 3 dimensional (they ask for surface area). 2D would just say area. Not surface area.
2) That r stands for radius
3) That it's circular (they give a radius). But radii are not usually negative. So where is this defined?
Let's make a chart with a few points to try to "see" what we're working with.
r = x ..... h = x + 9
1 10
2 11
5 14
0.1 9.1
Things certainly LOOK linear. This is born out by the equation h = x +9. Hmmmm Could it be a cone?
My best GUESS is that this is a cone. Or maybe a half of a cone. But there really is not enough given to be absolutely sure. Did the teacher give some instructions in class that are not here?
h|
| /
| /
| /
| /
9|/
|
|___________ x = r
This has me intrigued. If there is more to this, would you please tell me what got left out? hes correct give him brainlist i just did this for him
