Answer:
18
Step-by-step explanation:
Alright so here you have to work backwards. the volume of a cylinder is pi*r^2*h.
Your equation: 486 pi = pi*r^2*6
You know the height is 6 feet, so you can get rid of the 6 feet hanging off of your equation by dividing both sides by 6:
81 pi = pi*r^2
Now you notice that both sides have pi. You can eliminate it by dividing both sides by pi:
81 = r^2
To isolate the r, radius, you have to take the square root of both sides, since a square root is the inverse operation of squaring. You get:
9 = r
Now that you have the radius, you can find the diameter by multiplying the radius by 2, because a diameter = 2 * the radius:
18 = d
Hope this helps!
The second one is but i’m so so sure
Answer:
w = lap/ h - la
Step-by-step explanation:
1 Multiply both sides by a(w+p)a(w+p).
la(w+p)=wh
2 Expand.
law+lap=wh
3 Subtract law from both sides.
lap=wh-law
4 Factor out the common term w.
lap=w(h-la)
5 Divide both sides by h-la.
lap/h - la = w
6 Switch sides.
w = lap/ h - la
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Below are the choices that can be found from other source:
<span> −7
20
20 square root 449 over 449
negative 7 square root 449 over 449</span>
The answer seems to be the third one which is 20 square root 449 over 449.
Answer: for plato users
D. 341 and 375
Step-by-step explanation:
I just took the test