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3 years ago

Using 3.14 for p, what is the volume of a ball with a radius of 3 centimeters?

Mathematics

1 answer:

blagie [28]3 years ago

4 0

Answer: 113.1

Step-by-step explanation:

first you have to multiply 4/3*pie or 3.14 times 3

4/3 x 3.14 x 3 = 113.1

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3 years ago

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Simplify the expression below. 1/2 • 6+ 9 - (18÷6)

Anna007 [38]

First, solve within the parentheses. 18/6=3. Now solve the multiplication and division 1/2x6=3. The equation is now 3+9-3. Add and/or subtract from left to right. 3+9=12. 12-3=9. The answer is 9.

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3 years ago

In a recent Super Bowl, a TV network predicted that 25 % of the audience would express an interest in seeing one of its forthcom

AleksAgata [21]

Answer:

The right solution is "-8.25".

Step-by-step explanation:

The given values are:

Sampled people,

n = 150

Null and alternative hypotheses will be:

$H_0:p=0.53$

$Ha:p\neq 0.53$

The z-statistics will be:

⇒ $z=\frac{\bar{p}-p_0}{\sqrt{\frac{p_0(1-p_0)}{n} } }$

On substituting the values, we get

⇒ $=\frac{0.2-0.53}{\sqrt{\frac{0.53(1-0.53)}{150} } }$

⇒ $=\frac{-0.33}{\sqrt{\frac{0.24}{150}} }$

⇒ $=\frac{-0.33}{0.04}$

⇒ $=-8.25$

7 0

3 years ago

The area of the regular hexagon is 169.74 ft2 what is the perimeter, rounded to the nearest tenth

Bess [88]

Answer:

Perimeter of given regular hexagon is 48.5 ft.

Step-by-step explanation:

Let ABCDEF be the regular hexagon as shown in the attached figure.

O be the intersection point of the diagonals EB, FC and AD.

As per the property of regular hexagon, all the 6 triangles formed are equilateral triangles.

In other words,

$\triangle EOD, \triangle DOC, \triangle BOC, \triangle AOB, \triangle AOF , \triangle FOE$ are equilateral $\triangle s$ .

Area of an equilateral $\triangle$ is defined as :

$\dfrac{\sqrt{3}}{4} \times a^{2}$

Where a is the side of $\triangle$ .

Area of hexagon = $6 \times \dfrac{\sqrt{3}}{4}\times a^{2}$

We are given that area of hexagon = 169.74 $ft^{2}$

Let s be the side of hexagon.

$\Rightarrow 6 \times \dfrac{\sqrt{3}}{4}s^{2} = 169.74 ft^{2}\\\Rightarrow s = 8.08 ft$

A regular Hexagon is made up of 6 equal sides, so

Perimeter of a regular hexagon = $6 \times side$

Perimeter = $6 \times 8.08$

$\Rightarrow 48.5 ft$

So, perimeter of given regular hexagon is $48.5 ft$ .

6 0

3 years ago

The question is in the picture :)

Yakvenalex [24]

Answer: B

Step-by-step explanation: This is because C = circumfrence and R = radius

and pi is 3.14 which is the formula for finding the circumfrence of a circle

hope this helps mark me brainliest if it helped

3 0

3 years ago