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leva [86]
3 years ago
7

Can somebody please help me answer this question

Mathematics
1 answer:
victus00 [196]3 years ago
3 0

Answer:

18

Step-by-step explanation:

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I’m confused on my math someone help
Zielflug [23.3K]

Answer:

False, True, True are thr answers

4 0
3 years ago
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8. The base of a circular cone has a diameter of 10 cm and an altitude of 10 cm. The cone is filled with water. A sphere is lowe
nataly862011 [7]

Answer:

The volume of water that remains on the cone is 523.6 cm³

Step-by-step explanation:

To solve this problem you have to keep in mind the formules that describes the volume of a cone and the volume of a sphere.

Volume of a cone = (πr²h)/3

Volume of a sphere = (4/3)πr³

So, if the base of the cone has a diameter of 10 cm, its radius is 5 cm. Its altitude is 10 cm. ⇒Volume = (πr²h)/3 ⇒ Volume = [π(5²)10) ⇒

          Volume = 785.4 cm³. This is the initial volume of water.

Now if the sphere fits in the cone and half of it remains out of the water, the other half is inside the cone. Estimating the volume of the sphere and dividing it by two, you find the volume of water that was displaced.

Volume of a sphere = (4/3)πr³, here the radius is the same of the base of the cone (5 cm).

⇒ Volume = (4/3)π(5³)  ⇒ Volume = 523.6 cm³ ⇒ The half of this volume is 261.8 cm³. This is the volume of water displaced.

⇒ The volume of water that remains on the cone is 523.6 cm³ (785.4 cm³- 261.8 cm³)

6 0
3 years ago
Simply the imaginary number square root -45
Paraphin [41]

Answer:

3i\sqrt{5}

Step-by-step explanation:

Using the rule of radicals

\sqrt{a} × \sqrt{b} ⇔ \sqrt{ab}

and \sqrt{-1} = i

Given

\sqrt{-45}

= \sqrt{9(5)(-1)}

= \sqrt{9} × \sqrt{5} × \sqrt{-1}

= 3 × \sqrt{5} × i

= 3i\sqrt{5}

6 0
3 years ago
Solve |3x + 3) = 15.
prisoha [69]
It’s B, because you do 3-15 and that equals 12 and then you do 3 divided by 12 and that’s 4.
8 0
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Makayla has a smart phone data plan that costs $45 per month that includes 2 GB of data, but will charge an extra $20 per GB ove
nydimaria [60]
$45 + x($20)

That is the equation.
X= how many GB she went over
4 0
3 years ago
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